>>727
https://en.wikipedia.org/wiki/Reserve_Officers%27_Training_Corps
In 2010, ROTC graduates constituted
38.5 percent of newly commissioned U.S. Army officers,
1.8 percent of newly commissioned U.S. Marine Corps officers (through NROTC),
16.7 percent of newly commissioned U.S. Navy officers and
38.1 percent of newly commissioned U.S. Air Force officers,
for a combined 30 percent of all active duty officers in the Department of Defense commissioned that year.

海兵隊だけ目立って少ないけど、これは海軍の予備役将校訓練課程から来るため
陸軍や空軍は目立って多く、ROTCなしでは指揮官不足に陥る
コリン・パウエルのようにROTC出身で統合参謀本部議長にまで行った人物もいる