1940 - 1941
ACTIVATED 06 SEPTEMBER 1940 AT QUANTICO, VIRGINIA, AS THE 1ST 1st Medical Battalion AND ASSIGNED TO THE 1ST MARINE BRIGADE
DEPLOYED DURING OCTOBER 1940 TO GUANTANAMO BAY, CUBA
REASSIGNED DURING FEBRUARY 1941 TO THE 1ST MARINE DIVISION
RELOCATED DURING APRIL 1941 TO QUANTICO, VIRGINIA, AND PARRIS ISLAND, SOUTH CAROLINA
RELOCATED DURING SEPTEMBER 1941 TO NEW RIVER, NORTH CAROLINA

1942 - 1947
DEPLOYED DURING JUNE - JULY 1942 TO WELLINGTON, NEW ZEALAND
PARTICIPATED IN THE FOLLOWING WORLD WAR II CAMPAIGNS
GUADALCANAL
EASTER NEW GUINEA
NEW BRITAIN
PELELIU
OKINAWA
PARTICIPATED IN THE OCCUPATION OF NORTH CHINA, SEPTEMBER 1945 - MAY 1947
REDEPLOYED DURING MAY 1947 TO GUAM

1947 - 1964
REACTIVATED 16 JULY 1947 AT CAMP PENDLETON, CALIFORNIA, AND ASSIGNED TO THE 1ST MARINE DIVISION, FLEET MARINE FORCE
DEPLOYED DURING AUGUST 1950 TO KOBE, JAPAN
PARTICIPATED IN THE KOREAN WAR, SEPTEMBER 1950 - JULY 1953, OPERATING FROM
INCHON-SEOUL
CHOSIN RESERVOIR
EAST-CENTRAL FRONT
WESTERN FRONT
PARTICIPATED IN THE DEFENSE OF THE KOREAN DEMILITARIZED ZONE, JULY 1953 - APRIL 1955
RELOCATED DURING APRIL 1955 TO CAMP PENDLETON, CALIFORNIA

1965 - 1998
DEPLOYED DURING JUNE 1965 TO OKINAWA
PARTICIPATED IN THE WAR IN VIETNAM, MARCH 1966 - APRIL 1971, OPERATING FROM
CHU LAI
DA NANG
AN HOA
QUANG TRI
PHU BAI
RELOCATED DURING APRIL 1971 TO CAMP PENDLETON, CALIFORNIA
PLACED UNDER THE OPERATIONAL CONTROL OF THE 1ST FORCE SERVICE SUPPORT GROUP, FLEET MARINE FORCE, ON 30 MARCH 1976
PARTICIPATED IN OPERATIONS DESERT SHIELD AND DESERT STORM, SOUTHWEST ASIA, AUGUST 1990 - APRIL 1991
PARTICIPATED IN OPERATION RESTORE HOPE, SOMALIA, DECEMBER 1992 - JANUARY 1993