us entered world war 1 on april 1917.
us entered world war 1 on april 1917.
when did the us enter world war 1?
april 1917
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bullet::::- 1 august – germany and russia enter world war i with germanys declaration of war on russia.









































bullet::::- 3 august









































bullet::::- france and belgium enter world war i when germany invades belgium and declares war on france.









































bullet::::- the imperial german navy leases the cargo-passenger ship "answald" for conversion into germanys first seaplane carrier, sms "answald", designated "flugzeugmutterschiff" i (airplane mothership i).









































bullet::::- 4 august – the united kingdom enters world war i, declaring war on germany. at the time, the royal naval air service has 52 seaplanes, of which only 26 are serviceable, with 46 more on order.
1914 in aviation