Correspondence, journals, and other papers relating to Merillat's activities as staff historian with the 1st Marine division during the Battle of Guadalcanal, 1942-1943. Includes a copy of a Japanese map, translation of the Japanese written on the map, and commentary on the map concerning the Japanese garrison on Guadalcanal following the U.S. landings. Also includes Merillat's commentaries on several books concerning the Battle of Guadalcanal.