### Question
Can you define what World War I means?


### Answer
**World War I** is defined as the following in *10 U.S.C. § 12731*:

> the period beginning on April 6, 1917, and ending on November 11, 1918

#### Citation:
  - *10 U.S.C. § 12731*
  - Heading: **Subtitle E-Reserve Components > PART II-PERSONNEL GENERALLY > CHAPTER 1223-RETIRED PAY FOR NON-REGULAR SERVICE**

