Assertion: national flag | /r/HasProperty | adopted as the war flag
Facets:
value: on may
type: TEMPORAL
Source sentences:
text: The ensign, known in Japanese as the Jyūrokujō-Kyokujitsu-ki (十六条旭日旗), was first adopted as the war flag on May 15, 1870, and was used until the end of World War II in 1945.