"You have to react instinctively. In this game there's no second place, only the quick and the dead."   In Vietnam, Mobile Guerrilla Force conducted unconventional operations against the Viet Cong and North Vietnamese Army. Armed with silencer-equipped MK-II British Sten guns, M-16s, M-79s, and M-60 machine guns, the men of the Mobile Guerrilla Force operated in the steamy, triple-canopy jungle owned by the NVA and VC, destroying base camps, ambushing patrols, and gathering the intelligence that General Westmoreland desperately needed.   In 1967, James Donahue was a Special Forces medic and assistant platoon leader assigned to the Mobile Guerrilla Force and their fiercely anti-Communist Cambodian freedom fighters. Their mission: to locate the 271st Main Force Viet Cong Regiment so they could be engaged and destroyed by the 1st Infantry Division.   Now, with the brutal, unflinching honesty only an eye witness could possess, Donahue relives the adrenaline rush of firefights, air strikes, human wave attacks, ambushes, and attacks on enemy base camps. Following the operation the surviving Special Forces members of the Mobile Guerrilla Force were decorated by Major General John Hay, Commanding General, 1st Infantry Division.