Believing that a cross-cultural approach would help the U.S. war effort during World War II, Murdock and a few colleagues enlisted in the Navy and wrote handbooks on the cultures of Micronesia, working out of an office at Columbia University. After completing the handbooks, Murdock and his fellow officers were sent to the Pacific as military government officials, serving for nearly a year in the administration of occupied Okinawa. While his pre-war fieldwork had been among the Haida and other indigenous peoples of the Northwest North American coast, Murdock's interests were now focused on Micronesia, and he conducted fieldwork there episodically until the 1960s.