17.—Bapaume falls to British. Roye and Lassigny occupied by French.
18.—Peronne, Chaulnes, Nesle and Noyon evacuated by Germans, who retire on an 85-mile front.
18.—City of Memphis, Illinois, and Vigilancia, American ships, torpedoed.
19.—Alexander Ribot becomes French premier, succeeding Briand.
21.—Healdton, American ship, bound from Philadelphia to Rotterdam, sunk without warning; 21 men lost.
26-31.—British advance on Cambrai.
April
1.—Aztec, American armed ship, sunk in submarine zone.
5.—Missourian, American steamer, sunk in Mediterranean.
6.—United States declares war on Germany.