WHEN YOU’RE WORKING WITH ARMY AND MARINE CORPS units, you immediately notice a difference. The Army is pretty tough, but their performance can depend on the individual unit. Some are excellent, filled with hoorah and first-class warriors. A few are absolutely horrible; most are somewhere in between. In my experience, Marines are gung ho no matter what. They will all fight to the death. Every one of them just wants to get out there and kill. They are bad-ass, hard-charging mothers. - Chris Kyle "American Sniper"