The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans

Khalid Elhassan - January 16, 2020

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
Operation Tannenbaum. Automatic Ballpoint

23. Operation Tannenbaum

The result was Operation Tannenbaum. It envisioned a two stage conquest with 21 German divisions – a force later deemed excessive and downsized to 11 – plus 15 Italian divisions. It would begin with attacks from Austria, southern Germany, and occupied France, assisted by paratroops dropped behind Swiss lines. The aim was to overrun the lower-lying parts of Switzerland, where most of the population and economic activity was located.

To the south, Italians were to mount holding operations. Once the important parts of Switzerland were conquered, follow up attacks were to be made against Swiss army remnants in the “National Redoubt” – a fortified zone in Switzerland’s mountainous south.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
A revised Operation Tannenbaum. Automatic Ballpoint

22. Tannenbaum’s Odds of Success

Operation Tannenbaum would probably have succeeded. Much has been made of Switzerland’s mountainous terrain, and the Swiss army planned to take advantage of their topography by retreating into the mountainous part of their country.

However, the overwhelming majority of the Swiss did not live high up in the mountains, but in the lower parts of the country, in valleys and foothills that were readily accessible to attacking Germans. Cutoff up in the mountains, one can only guess how long the Swiss forces in the National Redoubt might have been able to offer sustained resistance.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
Swiss border patrol in the Alps during WWII. Wikimedia

21. Could the Swiss Have Held off the Germans?

The Swiss could have turned to widespread partisan and guerrilla warfare. However, other Western European countries were occupied by the Nazis, without their citizens exhibiting much willingness to risk the massive reprisals the Nazis were eager to visit upon restive conquered subjects. The Nazis did not treat Western Europe as atrociously as they did the Eastern European Slavs. Western Europeans thus never felt that their backs were to the wall, or that they had nothing to lose.

Certainly not to the same extent as did, e.g.; the Soviets or Yugoslavs, whose fierce and widespread partisan resistance had no equivalent in Western Europe. It is unlikely that the Germans would have treated the Swiss with anything approaching the monstrousness that triggered widespread resistance in the East. Considering that they viewed the Swiss as fellow Germans to be incorporated into their Reich, the Nazis would probably have treated Switzerland even better than they did other Western Europeans.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
Swiss soldiers during WWII. War History Online

20. Switzerland Was Spared Because Its Neutrality Was Useful to the Germans

Fortunately, Hitler never got around to issuing the orders for Operation Tannebaum to proceed. While the Fuhrer would have been emotionally gratified by an invasion and conquest of Switzerland, there was no immediate need to do so.

The Swiss had no aggressive designs on the Third Reich, and surrounded on all sides by Axis territory, there was no security threat of an Allied occupation of Switzerland as a base from which to attack Germany. Switzerland also had no resources that were not readily available to the Germans via trade. Moreover, the Swiss banking system, combined with Swiss neutrality, made the country a convenient center for currency exchange and other international financial transactions.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
Churchill, FDR, and Stalin at the Yalta Conference in 1945. Encyclopedia Britannica

19. Churchill’s Plan to Attack the Soviets At the End of WWII

As the war in Europe drew to a close in the spring of 1945, Winston Churchill was growing increasingly exasperated by Soviet intransigence regarding Eastern Europe, which Stalin clearly aimed to turn into a Soviet empire. Britain had gone to war in order to defend Polish independence, but at war’s end Stalin was riding roughshod over the Poles.

The Soviet dictator insisted on keeping the third of Poland he had annexed in 1939 in cooperation with the Germans, reducing the Poles to Soviet clients, and extinguishing their freedom and independence. Churchill saw it as a matter touching British honor, so he ordered his generals to draw up plans to attack the Soviets as soon as Germany surrendered. The Prime Minister had nebulous aims of pushing the Red Army back to the USSR’s borders, or at least force Stalin to treat Poland fairly.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
Army positions in May of 1945. Wikimedia

18. Operation Unthinkable

Churchill’s generals presented him with Operation Unthinkable, whose title indicates what they thought of the Prime Minister’s idea. Two versions were offered, one offensive, the other defensive. The offensive envisaged a surprise attack on the soviets in July, 1945, intended to force Stalin to give Poland a “fair deal”. The defensive envisaged a British defense of Western Europe after America withdrew from the continent.

The Soviets had 10 million men available in the summer of 1945. They outnumbered the British and Americans in Europe 4:1 in men, and 2:1 in tanks – and superior tanks at that. The Allies had an advantage in the air, but even that was subject to challenge, as the Red Air Force by 1945 had formidable fighter and ground attack arms.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
Size of the Soviet military during WWII. Quora

17. The Red Army Was Formidable in 1945

As WWII drew to a close, the Soviet military was no longer the hapless rabble it had been in 1941 when the Germans invaded. By 1945, the Red Army had become a veteran and battle-hardened force, that had won bigger campaigns against significantly greater opposition than the Allies had faced.

In a nutshell, Churchill’s generals concluded that it would be ill advised to take on the Soviets. Far from being a pushover, the Red Army when plans were drawn for Operation Unthinkable was dangerous, vicious, and very big. If war broke out, Churchill was advised, it was more likely to end with the Red Army conquering all of continental Europe, rather than getting chased back to the USSR.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
Report from Churchill’s generals to the Prime Minister on the odds of Operation Unthinkable. UK National Archives

16. Churchill Quits Thinking About the Unthinkable

Churchill’s generals greatest argument against taking on the Red Army was to point out that, on her own, Britain stood no chance against the Soviets. The US had no incentive to attack them – especially not over Poland and Eastern Europe. Standing up for Poland might have been a point of honor for Churchill, but few in the British government, and fewer still in that of the US, thought Poland or Eastern Europe were worth an even greater war against the Soviet Union than the one they had just concluded against Germany.

Unlike Britain, America had never guaranteed Poland’s territorial integrity, nor had it entered WWII in order to defend Polish sovereignty. Presented with the preceding, Churchill grudgingly let the matter drop, and Operation Unthinkable was archived.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
Douglas MacArthur at the Inchon Landings. Smithsonian Magazine

15. Douglas MacArthur’s Plans to Nuke China

In September of 1950, Douglas MacArthur changed the character of the Korean War with a successful amphibious landing at Inchon. It led to the collapse of North Korea’s invasion of South Korea. MacArthur vigorously – as things turned out, too vigorously – pursued the routed enemy northward up the Korean Peninsula. Despite repeated warnings, MacArthur blithely dismissed mounting evidence that China would directly intervene in the war if his forces approached the Sino-Korean border. He insisted that the Chinese would do nothing.

MacArthur was wrong. Soon after his forces reached the Yalu River marking the border with China, the Chinese began pouring across in the hundreds of thousands, successfully evading detection. They struck in November, 1950, surprising MacArthur and catching him completely off guard. Within weeks, the Chinese had defeated and pushed his demoralized forces out of North Korea and back across the border into South Korea.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
President Truman and General MacArthur. Harry S. Truman Library

14. MacArthur’s Histrionics

With his judgment proven catastrophically wrong, and his forces chased down the Korean Peninsula by the Chinese faster than they had raced up in pursuit of the North Koreans, a humiliated MacArthur reacted with histrionics. He demanded that China be nuked. MacArthur’s plan was to drop up to 50 atomic bombs in Manchuria on Chinese cities, military concentrations, and communication centers. He sought to seal off the Korean Peninsula from China with a radioactive belt across Manchuria, stretching from the Sea of Japan to the Yellow Sea.

President Truman, whom MacArthur had assured only weeks earlier that China would do nothing if his forces marched up to its border, balked. Truman was especially wary of MacArthur’s further confident assurances that the Soviets would do nothing if America dropped dozens of nukes on their Chinese ally. When MacArthur publicly contradicted Truman, he was ordered to clear any further statements on the subject with the State Department first. MacArthur violated those orders, and again challenged Truman publicly on the use of atomic weapons. Truman fired him.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
American troops in South Vietnam. USA Today

13. The American Invasion of North Vietnam

America’s biggest problem during the Vietnam War was North Vietnamese infiltration into South Vietnam, and support for the insurgency there. So plans were made to take out North Vietnam with a direct invasion. As described by Harry G. Summers in On Strategy: A Critical Analysis of the Vietnam War, the plan was reminiscent of the Normandy invasion.

It called for landing an airborne division to the north and west of Hanoi to block off the approaches to the Hanoi-Haiphong region. That would be accompanied by a seaborne invasion, with three divisions landed on beaches in the Haiphong area. The Haiphong force would then drive on to Hanoi, and linkup up with the airborne troops there.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
NVA engineers erecting a bridge on the Ho Chi Minh Trail. Imgur

12. The Strategic Aim Behind Invading North Vietnam

American planners figured that by capturing and securing the Hanoi-Haiphong area, outside support for North Vietnam would be drastically curtailed. By extension, so would the support for the communist forces in South Vietnam. The two major railroads linking North Vietnam to China would be severed, the country’s main seaport would be in American hands, and the lines of communications to the South would be interdicted.

Starved of Chinese and Soviet arms, munitions, and supplies, and cutoff from a steady infusion of North Vietnamese manpower, planners expected that organized armed resistance in South Vietnam would wane and collapse. While the plan stood a high chance of success against the North Vietnamese, it was deemed too dangerous because China would likely join the fray.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
North Vietnamese convoy on the Ho Chi Minh trail en route to South Vietnam. Thing Link

11. Concerns About Chinese Intervention Kept the US From Invading North Vietnam

The plans for invading North Vietnam were drawn only fifteen years after the Korean War. In that conflict, US and allied forces had pursued the routed North Koreans all the way to the Chinese border, based on the mistaken belief that China would do nothing. That led to the unpleasant surprise of the Chinese jumping in and pushing American forces all the way back to South Korea.

If China directly joined the Vietnam War in response to an American invasion of North Vietnam, things could easily escalate from there into WWIII, with the Soviets getting dragged in. Unlike the situation during the Korean War, the US no longer held an overwhelming nuclear superiority: by the second half of the 1960s, the Soviets possessed thousands of nuclear warheads and the means of delivering them to targets in the US. American interests in Vietnam were deemed not worth the risk, and thus the planned invasion of Hanoi-Haiphong was shelved.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
Julius Caesar. Wikidata

10. Julius Caesar Wanted to Replicate Alexander the Great’s Eastern Conquests

Julius Caesar was a huge fan of Alexander the Great. Early in his career, Caesar wept when he saw a statue of the Macedonian conqueror. Upon being asked why, he replied that Alexander had conquered the world by the time he was 30, while he, Caesar, had passed that age and done nothing of note.

One of Caesar’s grandest ambitions was to conquer the east just like his idol, so after consolidating his power in Rome, he prepared to invade Parthia in 44 BC. It was to be a massive endeavor with the largest force he had ever led: 16 legions and 10,000 cavalry, in addition to support troops. As a preliminary, he planned to first invade and conquer the kingdom of Dacia, roughly modern Romania, which he calculated could be accomplished by the end of 44 BC. The following spring, he would move on to Parthia.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
According to Plutarch, Julius Caesar wanted to first conquer Dacia, then Parthia, before moving against the Scythians. Wikimedia

9. Could Caesar Have Conquered Parthia?

Parthia was no pushover. In 53 BC, a Parthian cavalry force of 10,000 all but annihilated a bigger Roman army of roughly 50,000, led by Caesar’s fellow Triumvir, Crassus. In 38 BC, Mark Antony invaded Parthia with an even larger force than that which Caesar had planned to use, numbering over 100,000 legionaries, 24,000 auxiliaries, and 10,000 cavalry. He met with disaster.

However, neither Crassus nor Mark Antony were in Caesar’s league as generals, while Caesar was an all time military great. And Parthia was vulnerable to a Roman army led by a gifted general. In the 2nd century AD, the emperor Trajan did what Caesar had planned, conquering Dacia, then invading and defeating Parthia, seizing its capital city of Ctesiphon, annexing Mesopotamia, and dictating a highly favorable peace treaty. Caesar might have done the same in the 40s BC, but he never got the opportunity: he was assassinated three days before he was to leave Rome for the Parthian campaign.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
Alexander the Great. Wikimedia

8. Alexander the Great’s Plans to Conquer the West

Philip II of Macedon‘s lifelong ambition was to conquer Persia, but he was assassinated before he could try. It was left to his son, Alexander the Great, to accomplish his father’s dream. Alexander conquered the Persian Empire, then pushed beyond through Central Asia and into India, before his soldiers finally had enough and refused to march any further.

Thwarted from further conquests in the east, Alexander began planning to conquer the west. Reportedly, the travels of the pioneering Greek geographer Pytheas, in the 4th century BC, were actually a scouting trip and spying mission on behalf of Alexander.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
Rome, in red, in the days of Alexander the Great. Quora

7. How Would Alexander Have Conquered the West?

Ancient sources disagree on the details. Some contend that Alexander planned to march westwards from Macedonia to Ilyricum, thence into Italy, before continuing on to Gaul and Hispania. Others claim that he had a more ambitious plan to circumnavigate the Mediterranean by land, marching west from Egypt to conquer Libya, Carthage, Numidia, and Mauretania. He then planned to cross the narrows near the Pillars of Hercules to invade Hispania, then Gaul, before turning east to conquer Italy, and finally back to Macedon. Either route, Italy, and the small but rising Roman Republic therein, were on Alexander’s agenda.

If Alexander had invaded Italy, he probably would have won, and in the process perhaps extinguished the Roman Republic when it was still in its cradle. In addition to being one of history’s greatest conquerors, Alexander had in the elite Macedonian phalanx and Companion Cavalry the world’s best infantry and cavalry at the time. Rome back then was simply not in Alexander the Great’s league (see map above).

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
A phalanx. Pintrest

6. Alexander’s Macedon Was Significantly More Powerful Than Contemporary Rome

Roman legions bested the Macedonian phalanx in the 2nd century BC’s battles of Cynoscephalae and Pydna. However, in the 4th century BC, the Roman legion had not yet evolved into the ancient world’s best military unit. In Alexander’s day, the legion was still a spear-based force, a mixture of Greek and Samnite influences, more akin to the traditional phalanx of Sparta, albeit more flexible, than it was to the 2nd century sword-based legions that conquered Macedonia.

Two generations after Alexander, the Macedonian-type phalanx proved superior to the Roman legions during the war against Pyrrhus, a competent general but not Alexander’s equal. Fortunately for Rome, it never had to confront Alexander, for he died in Babylon in 323 BC, before he got around to launching his campaign to conquer the west.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
The proposed Silbervogel. False Steps

5. The Nazi Plot to Wreck New York With Radioactive Sand

In what turned out to be one of his worst decisions, Hitler inexplicably declared war against America on December 11th, 1941. It did not take long after the US was thus brought into the war in Europe for American heavy bombers to join the RAF in raining devastation upon the Third Reich.

The Germans wanted to return the favor, but aside from lacking aerial superiority to go on the offensive, the US homeland, all the way across the Atlantic Ocean from Nazi-occupied Europe, was too far away. So German scientists set about trying to solve that problem, and one of their proposed solutions was to render New York City uninhabitable by sprinkling radioactive sand all over the Big Apple.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
Silbervogel. Pintrest

4. Flying Over the Atlantic in a Silver Bird

To reach America, German scientist Eugen Sanger proposed a Racketenflugzeug – a rocket airplane. Known as Silbervogel, or Silver Bird, the proposed aircraft was to be propelled at 1200 miles per hour off railroad tracks from a rocket powered sled, then fly to a height of 90 miles. There, at the edge of space, the Silbervogel would use a series of roller-coaster-like “skips”, entering and exiting the upper atmosphere en route to the Big Apple.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
Silbervogel launch ramp. Papercraft Square

Upon reaching its destination, the Silbervogel would detonate a bomb packed with radioactive sand, to devastate New York City with a radiation cloud. It sounds cartoonish, straight out of one of those old time comics, but the theory was actually sound, and it just might have worked. Luckily for NYC, the Nazis were defeated before either the space plane or the villainous plan became a reality.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
President Kennedy and Curtis LeMay. Politico

3. The 1962 American Invasion of Cuba

In 1962, during the Cuban Missile Crisis, the Pentagon strongly urged John F. Kennedy to invade Cuba in order to remove Soviet nuclear missiles from the island. The Joint Chiefs of Staff were in unanimous agreement that a full-scale invasion was the only solution. They presented the Presidents with two versions: Oplan 316 for a full invasion, and Oplan 312 for aerial strikes to take out the missiles, followed by an invasion if necessary.

The hawks, led by Air Force general Curtis LeMay, had a clear preference for Oplan 316. They contended that there was no guarantee that air strikes alone would take out all the missiles, or that one or more of the missiles would not be fired at the US. Fortunately for everybody then and now, JFK had the moral backbone to resist getting railroaded into a military solution, and managed to solve the crisis without an invasion.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
Soviet tactical nuclear warheads used in the 1960s, with a yield of up to 10 kilotons, and a range of up to 32 kilometers. Nuclear Weapon Archive

2. The Expected Butcher’s Bill

The Pentagon’s planners expected 18,500 American casualties in the first ten days of an invasion of Cuba, assuming no nuclear explosions. However, unbeknownst to planners, the Soviet forces in Cuba had tactical nuclear weapons, and Soviet leader Nikita Khrushchev had preauthorized the local Soviet commander to use them at his discretion if he deemed it necessary. As the crisis intensified, Khrushchev withdrew release authority and forbade their use without his express permission. However, whether the modified orders would have been followed, is debatable.

In practice, tactical nukes were dispersed throughout Cuba to various Soviet units, physically controlled by officers as low down the chain of command as captains. Soviet forces had drilled in the use of those weapons as part of their defensive plan. In the heat of battle, the custodians of those weapons would have been under intense pressure as they were subjected to overwhelming US aerial strikes, naval bombardment, and ground attacks.

The Nazi Scheme to Bombard New York City With Rockets and Other Unfinished Military Plans
Kennedy and Khrushchev during the Cuban Missile Crisis. Eniclopedia Historia

1. The World Dodges a Bullet

If JFK had accepted the Pentagon’s advice and invaded Cuba, the results could have been horrific. It is not difficult to envision a desperate local Soviet commander in such a scenario, perhaps cutoff from communications with higher authority, resorting to the tactical nukes at hand to save his command, or at least ensure that its demise did not come cheap. The Red Army, with victory in WWII only 17 years in its past, did not lack military pride or an ethos of defiance unto death.

If the Soviets had used nukes in Cuba, the US intended an overwhelming nuclear response. Things could easily have escalated from there to a full blown nuclear exchange that would have devastated both countries and Europe, irradiated the Northern Hemisphere, and set humanity back centuries. Fortunately, JFK resisted the pressure from his generals and admirals, and relying on diplomacy, back channels, and blockade, successfully diffused the crisis without triggering WWIII.


Where Did We Find This Stuff? Some Sources and Further Reading

Automatic Ballpoint – Operation Tannenbaum

Battles of the Ancients – How Close Was Alexander the Great to Conquering Southern Italy?

Bentley, Matthew A. – Spaceplanes: From Airport to Spaceport (2009)

Blair, Clay Jr. – Hitler’s U-Boat War: The Hunters, 1939-1942 (1996)

Blair, Clay Jr. – Hitler’s U-Boat War: The Hunted, 1942-1945 (1998)

Imperial War Museum – The Operation Hush

Keegan, John – Intelligence in War: Knowledge of the Enemy From Napoleon to Al-Qaeda (2003)

Manchester, William – American Caesar: Douglas MacArthur, 1880-1964 (1978)

Miller, David – U-Boats (2000)

National Archives, UK – Operation Unthinkable

National Security Archive – Pentagon Expected 18,500 Casualties in Cuba Invasion of 1962, But if Nukes Launched, “Heavy Losses” Expected

Plutarch – Parallel Lives: Caesar

Summers, Harry G. – On Strategy: A Critical Analysis of the Vietnam War (1995)

U-Boat Aces – Rocket U-Boat Program

Wikipedia – Napoleon’s Planned Invasion of the United Kingdom

Wikipedia – Operation Tannenbaum

Wikipedia – Operation Teardrop

Wikipedia – Rocket U-boat