March 21--Russian forces cross Persian border into Turkish territory;
American oil steamer Healdton torpedoed without warning. March
22---United States recognizes new government of Russia. March 27--Gen.
Murray's British expedition into the Holy Land defeats Turkish army near
Gaza.

April 2--President Wilson asks congress to declare that acts of Germany
constitute a state of war; submarine sinks American steamer Aztec
without warning. April 4--United States senate passes resolution
declaring a state of war exists with Germany. April 6--House passes war
resolution and President Wilson signs joint resolution of congress.
April 8--Austria declares severance of diplomatic relations with United
States.

April 9--British defeat Germans at Vimy Ridge and take 6,000 prisoners;
United States seizes fourteen Austrian interned ships. April 20--Turkey
severs diplomatic relations with the U.S. April 28--Congress passes
selective service act for raising of army of 500,000; Guatemala severs
diplomatic relations with Germany.

May 7--War department orders raising of nine volunteer regiments of
engineers to go to France. May 14--Espionage act becomes law by passing
senate. May 18--President Wilson signs selective service act. Also
directs expeditionary force of regulars under Gen. Pershing to go
to France. May 19--Congress passes war appropriation bill of
$3,000,000,000.

June 5--Nearly 10,000,000 men in U. S. register for military service.
June 12--King Constantino of Greece abdicates. June 13--Gen. Pershing
and staff arrive in Paris. June 15--First Liberty loan closes with large
over-subscription. June 26--First contingent American troops under Gen.
Sibert arrives in France. June 29--Greece severs diplomatic relations
with Teutonic allies.

July 9--President Wilson drafts state militia into federal service. Also
places food and fuel under federal control. July 13--War department
order drafts 678,000 men into military service. July 14--Aircraft
appropriation bill of $640,000,000 passes house; Chancellor von
Bethmann-Hollweg's resignation forced by German political crisis.

July 18--United States government orders censorship of telegrams and
cablegrams crossing frontiers. July 19--New German Chancellor Michaelis
declares Germany will not war for conquest; radicals and Catholic party
ask peace without forced acquisitions of territory. July 22--Siam
declares war on Germany. July 23--Premier Kerensky given unlimited
powers in Rus