Battle of Peleliu
In 1941, the battalion joined the newly formed 1st Marine Division at New River, North Carolina, but later relocated to the west coast of the United States. During World War II the battalion fought in the Battle of Guadalcanal, Battle of Cape Gloucester, Battle of Peleliu, and the Battle of Okinawa. Following the Japanese surrender, the battalion was assigned to occupation duty in Northern China until 1947, at which time they returned to the United States.