USS Indianapolis (the WWII one) was a cruiser.

Cruisers were (and now, some attack subs and littoral and beach-storming ships are) named for US cities, battleships were (and boomer and also attack subs are) named for states.

Cruisers are now named for famous historic battles, and aircraft carriers for historic leaders (presidents, WWII Pacific commander Chester Nimitz, or Representative Carl Vinson, who arranged the Navy’s mid-20th century buildup from Newt Gingrich’s landlocked Georgia district)

Jimmy Carter, who was a submariner, is a submarine.