TIL that during WW2, the Japanese Army and Navy had an extremely intense rivalry, so much so that they actively sabotaged each other during key campaigns. The rivalry ran so deep, even equipment production was strictly segregated between "army" and "navy", and parts were made incompatible.

https://en.wikipedia.org/wiki/Interservice_rivalry#Japan
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1pxikto/til_that_during_ww2_the_japanese_army_and_navy/