Khaki was a summer uniform for US troops in the South Pacific during WWII—even khaki shorts...
LOL! Guess my dad was “alt-right nationalist” too since, in his 32 years as an officer in the USN, he wore LOTS of khaki. Me as enlisted, I had dungaress, whites or dress blues. Guess I may not be one of them radical alt-right nationalist extremists types then. ;-)