7.—Cuba and Panama at war with Germany.
8.—Austria-Hungary breaks with United States.
9.—Germans retreat before British on long front.
9.—Bolivia breaks with Germany.
13.—Vimy, Givenchy, Bailleul and positions about Lens taken by Canadians.
20.—Turkey breaks with United States.
May
9.—Liberia breaks with Germany.
11.—Russian Council of Workmen's and Soldiers' Delegates demands peace conference.
15.—Gen. Petain succeeds Gen. Nivelle as Commander-in-Chief of French armies. Gen. Foch is appointed Chief of Staff.