The fourth USS Baltimore (C-3) was a United States Navy cruiser, the fifth protected cruiser to be built by an American yard. Like the previous one, Charleston, the design was commissioned from the British company of W. Armstrong, Mitchell, and Company of Newcastle. Baltimore was an all-around improvement on Charleston, somewhat larger with more guns, thicker armor, and better machinery.

The second USS Charleston (C-2) was a United States Navy protected cruiser — the fourth US protected cruiser to be built. Lacking experience in building steel cruisers, the design was purchased from the British company Armstrong, Mitchell and Co. of Newcastle, the construction to be by an American shipyard. In design, she succeeded the "ABC" cruisers Atlanta, Boston, and Chicago with better protection, higher speed, and similar armament.