The Great War, 1871–1923 · THE MAP IN APR 1917

Map of the world in April 1917

America comes in · WWI

The world in April 1917: America comes in. Since December 1915, 18 territories changed status on this map: including United States of America, Puerto Rico, Cuba and 15 more.

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Map of the world in April 1917 (WWI): America comes in. Colours show Entente-aligned & imperial territories, The Entente & Allies, Germany and its allies — the Central Powers. — APR 1917 · THE GREAT WAR, 1871–1923

These maps are reconstructed from published sources · Cliopatria v 0.2.1 · Natural Earth physical geography · February 1917 shipping-zone amendments · German barred-zone declaration, February 1917

Source details

Cliopatria contributors / Seshat Global History Databank. Source polygons retained with original identities; geographic selections and corrections by Maps of History.. CC BY 4.0
Made with Natural Earth; geographic reference and physical land only. No modern political boundary is used as a historical boundary.. Public domain
Commercial and Financial Chronicle,10 February 1917, preserved by Federal Reserve Bank of St Louis.. Historical factual coordinate transcription; no scan redistributed
US Naval Institute Proceedings, March 1917, German declaration transcribed; February 3 Dutch safety-strip correction described separately.. Published 1917 historical document; factual boundary coordinates transcribed

Annual source features can describe claims, legal territory or military control. Occupied extensions are separated from the prewar Central Power homelands, while the original source names and shapes remain available.

reconstruction: 1917 · reconstruction: February 1917 · vector: 1815–1937 · vector: 1840–1978 · vector: 1848–1935 · vector: 1864–1921 · vector: 1866–2023 · vector: 1877–1935 · vector: 1877–2023 · vector: 1885–1925 · vector: 1890–1978 · vector: 1890–2023 · vector: 1895–1917 · vector: 1895–1941 · vector: 1895–1978 · vector: 1898–2023 · vector: 1900–1918 · vector: 1900–1986 · vector: 1905–1921 · vector: 1905–1923 · vector: 1905–1925 · vector: 1905–1927 · vector: 1905–1928 · vector: 1905–1942 · vector: 1905–1949 · vector: 1905–1999 · vector: 1908–1931 · vector: 1908–1935 · vector: 1911–1925 · vector: 1911–1929 · vector: 1912–1919 · vector: 1912–1921 · vector: 1912–1955 · vector: 1913–1918 · vector: 1913–1919 · vector: 1914–1938 · vector: 1915–1918 · vector: 1915–1921 · vector: 1915–1940 · vector: 1916–1917 · vector: 1916–1918 · vector: 1916–1919 · vector: 1917–1917 · vector: 1917–1919 · vector: 1917–1921

Layer records and reconstruction methods

What changes on the map

United States of America	— → The Entente & Allies
Puerto Rico	— → The Entente & Allies
Cuba	— → The Entente & Allies
Panama	— → The Entente & Allies
Brazil	— → The Entente & Allies
Portugal	— → The Entente & Allies
Angola	— → Entente-aligned & imperial territories
Mozambique	— → Entente-aligned & imperial territories
Guinea-Bissau	— → Entente-aligned & imperial territories
East Timor	— → Entente-aligned & imperial territories
People's Republic of China	— → The Entente & Allies
Siam	— → The Entente & Allies
Greece	— → The Entente & Allies
Liberia	— → The Entente & Allies
Romania	— → Under Central Powers occupation
Kamerun (German)	Germany and its allies — the Central Powers → Entente-aligned & imperial territories
Ruanda (German East Africa)	Germany and its allies — the Central Powers → Entente-aligned & imperial territories
Urundi (German East Africa)	Germany and its allies — the Central Powers → Entente-aligned & imperial territories

On the ground

Declared zone of unrestricted U-boat warfare, February 1917

The chapters of this moment

CH 8 — Blockade and U-boat war in WWI CH 9 — WWI outside Europe

Related maps

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