World War I
(7) The term “World War I” (A) means the period beginning on April 6, 1917 , and ending on November 11, 1918 , and (B) in the case of a veteran who served with the United States military forces in Russia, means the period beginning on April 6, 1917 , and ending on April 1, 1920 .
Source
38 USC § 101(7)
Scoping language
None identified, default scope is assumed to be the parent (chapter 1) of this section.