World War II
     The 100th Bombardment Group was one of the most highly decorated Army Air Force units of World War II.  It flew numerous B–17 missions against Nazi Germany.  Bombed many targets in France, suffered devastating losses during the bombing of  Regensburg, supported the Normandy Invasion, bombed St. Lo and Brest, held defend American forces during the Battle of the Bulge, covered the airborne assault of the Rhine River  and helped reduce Berlin to a pile of rubble.   It returned to the US in December, 1945 and was  inactivated at Camp Kilmer, New Jersey on December 21st., just in time for Christmas.
Activation
     Redesignated 100th Bombardment Group, Very Heavy, on 13 May 1947. Activated in the Reserve on May 29, 1947.  Inactivated June 27, 1949.
B-47 Stratojet / Tankers
     Established as the 100th Bombardment Wing, Medium on March 23, 1953.  Not operational from April 1, to June 24, 1955. Activated Jan. 1, 1956, at Portsmouth AFB, later renamed Pease AFB, New Hampshire and received B-47s.  On August 16, 1956, the 100th Air Refueling Squadron was added to the wing.   The 100th Bomb Wing performed global strategic bombardment training from April 1956 to February 1966, and conducted air refueling operations from August 1956 to December 1965.  It was deployed to Brize Norton RAF Station, England from December 1957 to June 1958.  It was one of the last B-47 wings to be inactivated.  It's proud Stratojets flew their last mission - to the aircraft graveyard and recycling center at Davis Monthan AFB, Arizona.  
Reconnaissance
     Moved without personnel or equipment to Davis-Monthan AFB in June 1966 and absorbed the resources of the 4080th Strategic Wing.  Redesignated the 100th Strategic Reconnaissance Wing on June 25, 1966; It performed global strategic reconnaissance with U-2 and drone aircraft using one overseas-based squadron, the 99th Strategic Reconnaissance Squadron, that was deployed to various operating locations as needed.   In mid-1976, it transferred the drone operation and associated DC-130 launch and CH-3 recovery aircraft to TAC and the U-2 operation to the 9th Strategic Reconnaissance Wing at Beale AFB.  
Refueling  
     The 100th moved without personnel or equipment to Beale AFB on September 30, 1976 and absorbed the KC-135 aerial tankers of the 17th Bomb Wing, which had recently been inactivated.  Redesignated the  100th Air Refueling Wing, Heavy, on September 30, 1976. Inactivated on March 15, 1983. 
Air Division
     Redesignated 100th Air Division on June 15, 1990 and activated on July 1, 1990 at Whiteman AFB, Missouri.  It assumed host unit responsibilities and supported the 351st Strategic Missile Wing, which was responsible for Minuteman II missile operations, and the 509th BMW, which was not operational.  The 100th Air Division was inactivated on July 26, 1991.
Status
     On February 1, 1992, the 100th was back, having been redesignated the 100th Air Refueling Wing.  It became the host unit at RAF Mildenhall, where it deployed aircraft for and managed the European Tanker Task Force, a rotational force that provided air refueling to US and NATO aircraft in the European Theater.
Components
Squadrons
       All of the bomb squadrons flew B-47s
    9 BS: Assigned Sept 30, 1976-
  99 BS Assigned Nov 1, 1972 - June 30, 1976 (Not operational March 27 - June 30, 1976)
349 BS: Assigned Jan 1, 1956 -         (Not operational Feb 12 - June 24, 1966 and Aug 11 - Sept 30, 1965)
350 BS: Assigned Jan 1, 1956 - July 1, 1976 (Detached March 4 - c. April 4, 1958; Not operational
        Feb 12 - June 24, 1966)
351 BS: Assigned Jan 1, 1956 - June 25,1966 (Not operational Feb 12 - June 25, 1966)
418 BS: Assigned March 1 , 1959 - Jan 1, 1962 (Not operational c. Oct 31, 1961-  Jan 1, 1962)
100 AR: Assigned Aug 16, 1956 - Jan 25, 1966 (Not Operational Dec 22, 1965-June 25, 1966)
509 AR: Attached April 8 - July 8, 1958