North America, 06 Apr 1917: United States Enters the Great War
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Political map of North America & the Caribbean on 06 Apr 1917 (American Empire: United States Enters the Great War), showing the following events: US occupation of the Dominican Republic; Treaty of the Danish West Indies; Germany announces resumption of unrestricted submarine warfare; Zimmermann Telegram; February Revolution; US declaration of war on Germany.

C a n a d a(Br. dom.)

U n i t e d S t a t e s

o f A m e r i c a

The
Bahamas(Br.)

Newfoundland(Br. dom.)

Panama(US prot.)

Leeward Islands(Br.)

Windward
Islands(Br.)

British
Columbia

Br. Honduras(Br.)

British
Guiana(Br.)

Honduras(US prot.)

Nicaragua(US prot.)

Puerto
Rico(US terr.)

Dom.
Rep.(US occ.)

I.Pines(US ctrl)

Clipperton(Mex. ctrl)

St P. & M.(Fr.)

May 1916US invades
Dominican Rep.

Aug 1916–Apr 1917US buys Danish West
Indies (Virgin Is.)

Feb 1917Germany resumes
unrestricted
submarine warfare

1 Mar 1917Zimmerman Telegram
made public

8–12 Mar 1917Russian Tsar overthrown

6 Apr 1917US declares war on Germany

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