The 18 Deadliest Battles in American Military History
The 18 Deadliest Battles in American Military History

The 18 Deadliest Battles in American Military History

Larry Holzwarth - October 27, 2018

The 18 Deadliest Battles in American Military History
USS Bunker Hill ablaze in the waters off Okinawa after being hit by two kamikazes. Its crew managed to save the ship. US Navy

6. Okinawa, the Pacific, April – June, 1945

The battle of Okinawa was an eighty-two day bloodbath in which the United States captured the island, intending to use it as a staging area for the invasion of Japan. Both the United States and the Japanese lost ships, aircraft, and troops in the battle, and Okinawan civilians suffered heavy casualties as well. The invasion fleet was the largest of any of the many which supported amphibious landings during the Pacific war. The United States Tenth Army was created out of Army and Marine units as a single command, and controlled its own air force, supported by US Navy carrier operations throughout the battle. Supporting ships faced the fanatical suicide attacks of the kamikazes, which did heavy damage to several American vessels. The Americans were supported by the British Pacific Fleet, which the Americans designated as Task Force 57.

The battle for Okinawa was the bloodiest of the Pacific War, with official reports listing more than 12,500 Americans killed, though many wounded died later and are not included in that figure (for example, of infection from burns suffered by many sailors in the kamikaze attacks). Among the casualties was the highest-ranking officer killed by enemy fire during the war, Lieutenant General Simon Bolivar Buckner Jr. Ernie Pyle was killed during the fighting to secure Okinawa, hit by stray machine gun fire. American casualties also included mental disorders, caused by the ferocity of the fighting and a Japanese tactic revealed on the island, when civilians were used by Japanese soldiers as human shields. During the fighting on the island the American troops, sailors, and airmen, heard the news of the death of Adolf Hitler and the unconditional surrender of Germany.

The 18 Deadliest Battles in American Military History
An American GI reads a warning sign in the ruins of bombed out Cologne. Some of the heaviest fighting of the war occurred in its last few weeks. US Army

5. Western Germany, March – May, 1945

It is widely believed that after the collapse of the German offensive in the Ardennes in late 1944 and early 1945 the German army largely quit fighting in the west. The casualty lists for the spring of 1945 argue otherwise. As the allies poured over the Rhine into Germany and spread out to capture German and Austrian territory, the Soviets pushed into eastern Germany and neared Berlin. More than half of the divisions available for the attack on Germany from the west (90), were American (49). Eisenhower, in command of all, designated the 12th Army group under General Omar Bradley as his primary spearhead. As the units fought their way across Germany, towns became occupied by American troops, which confiscated contraband and occupied private offices and homes as needed for their use, the original occupants evicted and forced to find housing on their own.

During the drive across Germany, German forces continued to resist, aided by civilians in many instances, and by older veterans of the First World War and Hitler Youth members. The five weeks following the thrust of the Americans across the Rhine and the collapse of German resistance saw more than 15,000 Americans killed in Germany. Americans dealt with stiff resistance from the Germans in the Ruhr Valley and its industrial complex, and as they did so they also released forced workers and captured large amounts of prisoners, which all had to be fed by the American logistics system. As American forces neared Leipzig they ran into fierce attacks by German ant-aircraft guns which were directed against the American troops. The last five weeks of the battle in Germany saw Americans killed at the rate of 3,000 per week, an indication of German resistance to the last.

The 18 Deadliest Battles in American Military History
An American LCT, loaded with troops and equipment prepares to depart for the Normandy beaches. US Army

4. Normandy, France, June – July 1944

The Battle for Normandy which began on June 6 1944 is generally agreed to have lasted until the third week of July. Allied troops fought their way ashore on the Normandy beaches and began moving inland almost immediately, where they encountered something the planners had not adequately taken into account – the hedgerows of the bocage country. While the British concentrated on taking the French town of Caen, which delayed the advance into France for several weeks, the Americans turned toward the capture of the port of Cherbourg. The foothold of the beachhead was expanded rapidly and troops and supplies continued to pour ashore, using the beaches themselves and two artificial harbors, called “mulberries”. But the advancing troops met heavy German resistance at all points, and poor weather often grounded their air support.

Winston Churchill had predicted that the combined casualties of the Allied troops, which included French commandos, and troops from other allied nations, would be about 20,000. The casualties for the first day were heavy, particularly at the American sector of Omaha Beach, and the fighting on French soil, particularly in the bocage – which were ideal for defensive fighting – continued to be high throughout the end of the battle for Normandy. When the operation ended in July, to be soon replaced by the battle across France, 16,293 Americans had been killed in the battle, ranking as the highest of the war to that date, higher than any of the battles of the Pacific War. The fighting continued in the battle of France, which yielded yet higher casualties among the Americans before the end of the year.

The 18 Deadliest Battles in American Military History
A road to Avranches is cluttered with equipment abandoned by the German troops hoping to escape encirclement by the Allies. US Army

3. The Battle for France, 1944

By July 25, 1944, more than 1.5 million troops had landed in France. By the end of the following month their number exceeded 2 million. Additionally thousands of pieces of equipment, tanks and guns, motorized vehicles, and all the accouterments of a mechanized army were on the French coast. By August 1, the American Third Army under George Patton was moving to take Brittany and territory southward towards the Loire Valley. On the fifteenth of August the invasion of southern France was launched, and German troops which had occupied territories in the south of France since the invasion of North Africa began withdrawing eastward. The Americans pushed forward, encountering steady resistance from the Germans as they moved eastward, occasionally launching strong counterattacks as they withdrew.

On September first Eisenhower took direct command of all ground forces in Europe and directed a slowdown of the Allied advance. He continued the strategy of advancing on a broad front, rather than adopting single direct thrusts, as a means of containing German counterattacks and to conserve supplies. The battle across France had freed most of the country from German control by early September, at a heavy cost of life, including for the Americans. From July 25 through September 14, 1944, 17,844 Americans had lost their lives, a number which does not include the casualties from the invasion of Southern France in the Mediterranean. The liberation of most of France had taken just over six weeks of almost constant fighting with a determined enemy who as yet showed no inclination to give up the fight.

The 18 Deadliest Battles in American Military History
Troops of the 101st Airborne Division watch supplies being dropped to them in beleaguered Bastogne, December 26, 1944. US Army

2. The Battle of the Bulge, Northern Europe, December 1944 – January 1945

In the morning of December 16, 1944, German columns struck American forces in the Ardennes, in a massive and determined assault which was intended to split the allied forces into four groups and capture the port of Antwerp. The attack was launched in heavy wintry weather, using forces which the allies were unaware that the Germans had gathered on the western front. The weather prevented the allies from resorting to their air superiority to contain the attack. The Americans resisted the attack, at first piecemeal, and then growing more organized, particularly at the northern elbow of the salient the Germans created and at Bastogne, which contained important crossroads. The resistance threw the Germans off schedule, denied the use of some roads which prevented columns from advancing parallel to each other, and gave the Americans time to rush other units to the battlefield.

The German assault included fourteen hundred tanks and over 400,000 troops. Eventually the United States committed over 600,000 men to first stopping the German advance and then reducing the salient – the famous Bulge – which had been created in the Allied lines. By the end of December the Germans were reinforced but by that time the assault was already doomed to failure, following the arrival of reinforcements by the Americans under Patton from the south and clearing weather in January which allowed the Americans to use their P-47s to attack German tanks from the air. The fighting remained fierce as the Germans were pushed back, finally retreating to the defenses of the Westwall, known to Americans as the Siegfried Line. Over 19,200 Americans were killed in the fighting before the battle ended in January, 1945. They included Americans who had surrendered as prisoners of war before being shot by Waffen SS troops in the Malmedy massacre, where at least 84 Americans were murdered.

The 18 Deadliest Battles in American Military History
US Marines move forward through terrain which offers mute testimony to the ferocity of the shelling by both sides. US Marines

1. Meuse-Argonne Offensive, France, September – November 1918

While Americans were singing Over There at home in 1918, the American troops which had been sent over there were involved in the deadliest battle of American history. The offensive launched by the American Expeditionary Forces in France involved 1.2 million men, the largest offensive in American military history, one of the Allied attacks known as the Hundred Days Offensive, a series of coordinated attacks designed to end the war to end all wars. The battle was fought in three phases, with the American troops gaining valuable experience and growing confidence in their abilities as it went on. It began with an assault by the Americans towards Sedan, followed by British attacks in Belgium the following day, and French assaults on German positions across northern France. The morale of the Allies was strengthened by the advance of the Americans, who were eager for battle, though inexperienced.

That inexperience showed in the casualties absorbed by the Americans, which were heavy. American forces fought with French tanks, and were supported by the forces of Great Britain and Australia, achieving their goals in splitting the Hindenburg Line, the main German defense perimeter, and driving the Germans backwards. The largest American assaults were in the sector around Verdun, though American units took part in actions to the north as well. During the second phase of the battle the famous Lost Battalion event occurred. By the beginning of November the Americans broke the Hindenburg Line as well as cleared the Argonne Forest, throwing the German defenses in disarray. French forces captured Sedan on November 6. The offensive ended with the ceasefire of November 11, 1918. By that time, in an offensive which lasted less than two months, 26,277 Americans had lost their lives.


Where do we find this stuff? Here are our sources:

“The Great War: Strategies and Tactics of the First World War”. William R. Griffiths. 2003

“The Coldest Winter: America and the Korean War”. David Halberstam. 2008

“Anzio 1944”. Clayton D. Laurie. United States Army Center of Military History. 1994. Online

“Patton at Bay: The Lorraine Campaign, 1944”. John Nelson Rickard. 2004

“Was Iwo Jima Worth the Cost?”. Robert S. Burrell, MHQ — The Quarterly Journal of Military History

“Riviera to the Rhine”. Jeffrey J. Clarke, Robert Ross Smith. United States Army Center of Military History. 1994

“Guadalcanal: The Definitive Account of the Landmark Battle”. Richard Frank. 1992

“Operation Dragoon 1944: France’s other D-Day”. Stephen J. Zaloga. 2009

“North Apennines 1944-45”. Dwight D. Oland, United States Army Center of Military History. 1996

“Luzon”. Dale Andrade, United States Army Center of Military History. 2003

“The Siegfried Line Campaign”. Charles B. MacDonald. United States Army Center of Military History. 1984 (1963). Online

“Operation Iceberg: The Invasion and Conquest of Okinawa in World War II”. Gerald Astor. 1996

“The Last Offensive”. Charles B. MacDonald. United States Army Center of Military History. 1993. Online

“D-Day: The Battle for Normandy”. Antony Beevor. 2009

“The Battle of Normandy, 1944”. Robin Neillands. 2002

“The Battle of the Bulge: Hitler’s Final Gamble”. Patrick Delaforce. 2004

“The Meuse-Argonne Offensive”. Military records section, National Archives online.