 These ships saw varied service during their careers . As part of Battleship Division Nine of the US Atlantic Fleet , Delaware was assigned to the British Grand Fleet after America 's entry into World War I , where she escorted convoys and participated in the blockade of the German High Seas Fleet . In contrast , North Dakota remained on the American coast throughout the war , due in part to worries about her troublesome turbine engines . Post @-@ war , they conducted training cruises with the US Atlantic Fleet . In 1924 , Delaware was broken up for scrap metal in accordance with the Washington Naval Treaty of 1922 . North Dakota survived until 1931 , when she too was scrapped , under the terms of the 1930 London Naval Treaty . 
