There were about 100 Union soldiers stationed at Fort Sumter during the attack in April 1861.

During the attack on Fort Sumter in April 1861, there were approximately 100 Union soldiers stationed at the fort. This group, led by Major Robert Anderson, was significantly outnumbered by Confederate forces. The fortification was a strategic point in Charleston Harbor, making it a focal point at the start of the Civil War. Despite their limited numbers, the Union soldiers held out for 34 hours under heavy bombardment before surrendering. This event marked the beginning of the conflict, highlighting the tensions between the Union and the Confederacy and setting the stage for the battles to come.