World War I was a primary cause of the outbreak of World War II.

the verdict

INSUFFICIENT LEANING

Recorded sources

2 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that World War I was a primary cause of the outbreak of World War II?

Unclear. Two reference sources indicate that unresolved tensions and instability following World War I contributed in part to the outbreak of World War II, but neither identifies World War I as a primary cause.

Verdict: PARTIAL LEAN · 2 sources for, 0 against · Last checked 3 Oct 2026

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 2

World War I - Wikipedia

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World War I - Wikipedia. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/World_War_I

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More for · 1

World War II: Causes, Timeline, Key Battles, Facts & Legacy | HISTORY

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World War II: Causes, Timeline, Key Battles, Facts & Legacy | HISTORY. (n.d.). history.com. https://www.history.com/articles/world-war-ii-history

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