When most people think of attacks on U.S. soil, a few high-profile events—like Pearl Harbor or 9/11—usually come to mind. However, the nation’s past is dotted with lesser-known but deeply impactful acts of violence that rarely make it into standard history lessons. These incidents have tested the nation’s resilience, challenged its sense of security, and left scars on communities across the country. This article uncovers twelve shocking attacks you might not have learned in school, each one a powerful reminder of the complexities of America’s history.