Road to WW2 · TURNING POINT · 1941

US oil embargo on Japan (1941)

On the Road to WW2 map as “The oil embargo reaches Tokyo”

26 Jul–1 Aug 1941 — After Japan seizes southern Indochina, Washington freezes its assets and cuts off its oil. Japan’s fleet must now draw on its reserves, leaving a matter of months on the clock to war.

When: 26 Jul–1 Aug 1941
Type: Turning point
Chapter: Japan’s road to Pearl Harbor (chapter 10 of Road to WW2)
Atlas: The Road to War, 1931–1941

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Map showing US oil embargo on Japan (1941), turning point in The Road to War, 1931–1941 — TURNING POINT · THE ROAD TO WAR, 1931–1941

These maps are reconstructed from published sources · Cliopatria v0.2.1 — dated political boundaries · US Consul at Hanoi — Japanese bases agreement,22September1940 · US diplomatic records — Jehol occupation,March1933 · US Chargé — fall ofLangson andHaiphong landings,26September1940 · Natural Earth — physical reference geography · USMA: Japanese Occupation, 1940

Source details

Cliopatria contributors / Seshat Global History Databank. CC BY4.0 · Dated polity and constituent territory selections; campaign-dependent occupation overlays reconstructed separately.
US Consul at Hanoi — Japanese bases agreement,22September1940. Historical facts consulted; no source artwork or prose republished
US diplomatic records — Jehol occupation,March1933. Historical facts consulted; no source artwork or prose republished
US Chargé — fall ofLangson andHaiphong landings,26September1940. Historical facts consulted; no source artwork or prose republished
Natural Earth. Public domain
United States Military Academy, Department of History, Digital History Center. Source-map facts used for independent geographic reconstruction; original chart artwork is not republished

The separately published Tibetan polity remains neutral. The authored modern-China interaction region does not make Tibet a Chinese battlefield or Allied-controlled territory.

reconstruction: 1905–1942 · reconstruction: 1936–1937reference forpost1933Manchukuo · reconstruction: 1940 · reconstruction: 1940-09-22/26 · reconstruction: 1940.72 · reconstruction: 1940–1942 · trace: 1933occupation;1940publishedprovince reference · vector: 1890–1978 · vector: 1890–2023 · vector: 1915–1940 · vector: 1932–1955 · vector: 1936–1941 · vector: 1939–1943 · vector: 1939–1946 · vector: 1940–1942

Layer records and reconstruction methods