Safe conduct

Safe conduct pass, issued by American forces and air dropped in Vietnam to encourage defection of North Vietnamese and Viet Cong forces.

Safe conduct, safe passage, or letters of transit, is the situation in time of international conflict or war where one state, a party to such conflict, issues to a person (usually, an enemy state's subject) a pass or document to allow the enemy alien to traverse its territory without harassment, bodily harm, or fear of death.