Whether it's on the battlefield or in the Olympic stadium, these military competitors prove that limits simply don't exist.
16 members of the military have competed or will compete in the London Olympics in events ranging from wrestling to shooting, according to the Department of Defense. And some have earned some serious bragging rights.
On July 31, U.S. Army Sgt. Vincent Hancock become the first shotgun shooter to win consecutive Olympic gold medals in men’s skeet during this year's games.
And Army Olympian Staff Sgt. John Nunn has helped bring fame to the sport of race walking -- an event more difficult that it appears, in which a runner must keep contact with one foot on the ground at all times. Nunn will compete Aug. 11 in London.
Nunn, along with other athletes interviewed, told the Department of Defense that the Army helped him become more disciplined and to achieve goals.
“The Army has really taught me how to bring it all in together and realize what is important,” Nunn said.
Read these stories and more in the slideshow below: