American pilots fought the enemy and their own political leaders in the skies over Vietnam. See exclusive interviews with North Vietnamese veterans, secret American operations in Laos and Cambodia, and the Navy's classified programme to counter heavy losses against Vietnamese pilots.

We look at the Viet Cong's secret methods to foil America's attempts to seal off South Vietnam. From the Ho Chi Minh trail to the tunnels of Cu Chi, the remarkable story of hidden supply highways, underground cities, covert camps and double agents.

We look at the war behind the war in Vietnam, the critical struggle over public opinion. Secret Vietnamese strategies were designed to sabotage American morale, while Lyndon Johnson's White House attempted to keep the support of US citizens.

As regular American units fought under rules of engagement imposed by their political leaders, unconventional Special Forces fought classified battles, often across the fence. Their covert missions led them deep into North Vietnam, Laos, and Cambodia. These are the stories of clandestine operational groups, their missions and mysterious means of survival.

We look at the secrets behind Ho Chi Minh's control of Vietnam and his ability to force the Japanese, the French and the Americans out of his country during his three decade reign.