Five years to freedom

On his first Special Forces mission , West Point grad Nick Rowe is ambushed by a superior force of V.C. and captured. He's kept in the U Minh forest in the Mekong Delta by V.C. militia for 5 years. He deceives them about his Intel background, telling them that he's in infrastructure building missions. When they find out, the V.C. will kill him at the first opportunity, unless he can escape....All true.