Louis Armstrong registers for the draft
Future jazz great Louis Armstrong of New Orleans was among nearly 24 million men aged 18–45 who registered for the draft during 1917–18, a requirement of the new Selective Service System. Notice that his first name is recorded incorrectly as Lewis. And while his date of birth was recorded as July 4, 1900, Armstrong was actually born on August 4, 1901.
National Archives, Records of the Selective Service System (World War I)