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World War I

Defined in 3 places across 2 titles of the United States Code.

The term “World War I” includes, in the case of any veteran, any period of service performed by such veteran after November 11, 1918, and before July 2, 1921, if such veteran served in the active military, naval, or air service after April 5, 1917, and before November 12, 1918.

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The term “World War I” includes the period from April 6, 1917, to March 3, 1921.

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The term “World War I” means the period beginning on April 6, 1917, and ending on November 11, 1918.

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