In addition to his military and business careers, Roosevelt was active in politics and government. He served as Assistant Secretary of the Navy (1921–1924), Governor of Puerto Rico (1929–1932), and Governor-General of the Philippines (1932–1933). He resumed his business endeavors in the 1930s, and was Chairman of the Board of American Express Company, and Vice-President of Doubleday Books. Roosevelt also remained active as an Army reservist, attending annual training periods at Pine Camp, and completing the Infantry Officer Basic and Advanced Courses, the Command and General Staff College, and refresher training for senior officers. He returned to active duty for World War II with the rank of colonel, and commanded the 26th Infantry Regiment. He soon received promotion to brigadier general as assistant division commander of the 1st Infantry Division.