Lucky Strike was one of the brands included in the C-rations provided to US combat troops during the Second World War. Each C ration of the time included, among other items, nine cigarettes of varying brands because at the time, top military brass would declare that tobacco was essential to the morale of soldiers fighting on the front lines. The other cigarette brands included in the C-rations were Camel, Chelsea, Chesterfield, Craven "A"-Brand, Old Gold, Philip Morris, Player's, Raleigh, and Wings. The practice of including cigarettes in field rations continued during the Korean and Vietnam Wars, ending around 1975 or 1976 with the growing knowledge that smoking caused various kinds of health problems.