The state was spared many of the horrors of war as only two minor battles were fought within its borders. Morgan's Raid in the summer of 1863 spread fear but little damage. Ohio troops fought in nearly every major campaign during the war. Nearly 7,000 Buckeye soldiers were killed in action. Its most significant Civil War site is Johnson's Island, located in Sandusky Bay of Lake Erie. Barracks and outbuildings were constructed for a prisoner of war depot, intended chiefly for officers. Over three years more than 15,000 Confederate men were held there. The island includes a Confederate cemetery where about 300 men were buried.