 Through the remainder of the war , ironclads saw action in the Union 's attacks on Confederate ports . Seven Union monitors , including USS Montauk , as well as two other ironclads , the ironclad frigate New Ironsides and a light @-@ draft USS Keokuk , participated in the failed attack on Charleston ; one was sunk . Two small ironclads , CSS Palmetto State and CSS Chicora participated in the defence of the harbor . For the later attack at Mobile Bay , the Union assembled four monitors as well as 11 wooden ships , facing the CSS Tennessee , the Confederacy 's most powerful ironclad and the gunboats CSS Morgan , CSS Gaines , CSS Selma . 
 Through the remainder of the war , ironclads saw action in the Union <a href='null_genetive' title='1'><mark>'s</mark></a>attacks on Confederate ports . Seven Union monitors , including USS Montauk , as well as two other ironclads , the ironclad frigate New Ironsides and a light @-@ draft USS Keokuk , participated in the failed attack on Charleston ; one was sunk . Two small ironclads , CSS Palmetto State and CSS Chicora participated in the defence of the harbor . For the later attack at Mobile Bay , the Union assembled four monitors as well as 11 wooden ships , facing the CSS Tennessee , the Confederacy <a href='null_genetive' title='2'><mark>'s</mark></a>most powerful ironclad and the gunboats CSS Morgan , CSS Gaines , CSS Selma . 
Thru da remainder of tdawar , ironclads saw action in the Union  attacks on Confederate ports . Seven Union monitors , including USS Montauk , as well as two other ironclads , thdaronclad frigate New Ironsides and a light @-@ draft USS Keokuk , participated in thedailed attack on Charleston ; one was sunk . 2 small ironclads , CSS Palmetto State and CSS Chicora participated in the daence of the harbor . For the ldar attack at Mobile Bay , the Union assembled four monitors as well as 11 wooden ships , facing the CSS Tennessee , the Confederacy  most powerful ironclad and the gunboats CSS Morgan , CSS Gaines , CSS Selma .