§Third System forts were destined
to play an important role at the start of the Civil War.
bombardment of Fort Sumter in Charleston harbor on April 12, 1861,
marked the outbreak of fighting.
§Robert E. Lee believed that the
fort could not taken by conventional smoothbore artillery.
April 1862, Union forces under General Quincy A. Gillmore captured Fort Pulaski near
§In less than two days, Gilmore's rifled artillery
had dismounted eleven of the Confederate guns and battered a large breach
in the fort's brick wall.
§Fort Pulaski surrendered on
April 11, 1862, a date that also signaled the obsolescence of the
masonry forts of the Third System.