As the Marianas campaign progressed though, the Marines learned to use the Intelligence Division (ID) to handle the Japanese civilians, and by the time the Marines reached Okinawa, the ID had become a routine part of the operation.
As the Marianas campaign progressed, the Marines developed a strategy involving the Intelligence Division (ID) to handle Japanese civilians. By the time they reached Okinawa, the use of the ID was an integral part of their operational procedures.