Thought there was a draft in WW2 for the US - https://www.sss.gov/About/History-And-Records/Induction-Statistics
10 MM in WW 2, dang.
Also, Johnson did serve in the US Naval Reserve, for what that's worth and did see some action in WW2. Although it seems that he was just on a 'fact finding' mission but somehow ended up getting a Silver Star