In November 1919, he joined the 1st Provisional Marine Brigade in Haiti, taking part in action against Haitian bandit forces until May 1921. During this time, he participated in the Battle of Port-au-Prince (1920) where he successfully ambushed a column of Caco rebels. In August 1921, he was assigned to the Marine barracks at Quantico, where he remained for the next two years. During that time he was detached for several months of duty with the guard company at the Disarmament Conference in Washington. He also completed the Company Officers Course at the Marine Corps Schools.