>>221
https://www.quora.com/What-percentage-of-the-marine-corps-are-combat-personnel-as-opposed-to-support-personnel
A Marine infantry battalion is about 900 Marines and at 24 infantry battalions that equals about 21, 600 Marines out of an end force of about 184,000 That equates to about 12% of all Marines are infantry.

歩兵の比率は海兵隊全体の12％
その他に砲兵、戦車兵、パイロット、工兵、偵察隊なども戦闘に従事する兵員に含めれば比率はもっと大きくなる