Highest casualty rate was actually u-boats. Of 40,000 kriegsmariners trained for u-boats during the war, 75% became casualties. Incredibly, this was even higher

Highest casualty rate was actually u-boats. Of 40,000 kriegsmariners trained for u-boats during the war, 75% became casualties. Incredibly, this was even higher than Kamikaze squadrons (on account of the fact that not all flyers were assigned a mission, and not all missions ended up finding a target)