Attributed in Patton (motion picture) (1970). This is sometimes said to have been uttered in a speech by Patton to the Sixth Armored Division of the Third Army, 31 May 1944, but documentation is lacking. The following poem appeared in the Bureau of Aeronautics Navy Department News Letter, 1 Jan. 1943: "The greatest duty of a sailor / Is duty from worries and cares, / Not to die for his country, / Make our enemies die for theirs!"
Statement to John Hill Brinton at the start of his Tennessee River Campaign, early 1862. "Personal Memoirs of John H. Brinton, Major and Surgeon U.S.V., 1861-1865". Book by John H. Brinton, p. 239, 1914.