troops in was to protect air fields. and then we had to protect ground troops around the air fields and we backed into this war, not really understanding what we were doing. >> let's go! >> the soldiers moved off into the jungle and encountering only an occasional sniper. >> they didn't play by our rules. >> green hornets. >> couldn't find the enemy. they were invisible. it was their country. [ gunshots ]. >> the enemy again broke contact. slipped away and disappeared. >> combat arouses emotions so powerful that teaches you about human nature at its best and at its worst. >> give the baby to mama. come on. uvc.