In this book the record of the Marine occupation of the Dominican Republic from 1916-1924 is presented as an example of the active role played by the Marine Corps in the Caribbean region in the first three decades of the 20th Century. It was prepared principally from primary sources such as official reports, memoirs, personal correspondence, and recollection of the Marines involved. Captain Stephen M. Fuller, a Marine reserve officer, served on active duty as an aviation supply officer from 1968 to 1971. Subsequently, he spent three summers with the History and Museums Division, two of them in research and writing of this pamphlet and the third in preparation of a forthcoming pamphlet on Marines in Haiti. He has a Ph.D. in History from the University of New Mexico and currently is a candidate for the J. D. Degree at the University of Tulsa College of Law. In addition, he has taught for several years at Northeastern State College in Tahlequah, Oklahoma. The co-author, Dr. Graham A. Cosmas, joined the staff of the History and Museums Division in December 1973 after teaching at the University of Texas and the University of Guam. He has a Ph.D. in History from the University of Wisconsin and has published several articles on U.S. military history as well as An Army for Empire: The United States Army in the Spanish-American War.