Just a bit east of Savanah, GA on an island in the river is Fort Pulaski, a 3rd defense fort. It commanded the approach to Savanah from the ocean and was built in the early 1800’s. State of the art for its day. Then in April of. 1862 the Union unlimbered several new type cannon on Tybee Island about a mile away from the fort and they started to shell the fort. 30 hours lager the garrison surrendered. The new cannon with rifled barrels breached the fort at two places and the magazine was almost exposed. These scars are from the short battle that rendered most of the brick defenses moot.