Period:

Second World War (1939-1945)

Rank:

Lieutenant Commander

Unit:

U.S.S. Drum (SS-228), U.S. Navy

Awarded on:

May 28th, 1943

"For extraordinary heroism in the line of his profession as Commanding Officer of the U.S.S. DRUM (SS-228), during the FIFTH War Patrol of that submarine during the period 24 March 1943 to 13 May 1943, in enemy controlled waters of the Southwest Pacific. Lieutenant Commander McMahon daringly maneuvered his submarine into position and attacked, sinking 15,874 tons of hostile shipping, including a loaded freighter. Despite strong and determined counter measures, he persisted in his attacks against the enemy while expertly avoiding damage to his own ship. His superb seamanship and great courage were in keeping with the highest traditions of the United States Naval Service.

Commander 7th Fleet: Serial 0943

Period:

Second World War (1939-1945)

Rank:

Lieutenant Commander

Unit:

U.S.S. Drum (SS-228), U.S. Navy

Awarded on:

March 4th, 1943

"For conspicuous gallantry and intrepidity in action as Commanding Officer of the U.S.S. DRUM (SS-228), during the successful and aggressive FOURTH War Patrol of that submarine in enemy Japanese-controlled waters from 29 November 1942 to 24 January 1943. Executing skillful submerged attacks against large enemy surface craft, Lieutenant Commander McMahon and his dauntless crew seriously damaged an enemy aircraft carrier of 7,600 tons and a tanker of 3,000 tons. Despite strong enemy counter efforts, he brought his ship back to port without injury to personnel or damage to his craft. His outstanding leadership and indomitable fighting spirit were in keeping with the highest traditions of the United States Naval Service."

Pacific Fleet Board Awards: Serial 31

Period:

Second World War (1939-1945)

Rank:

Commander

Unit:

U.S.S. Drum (SS-228), U.S. Navy

Awarded on:

December 17th, 1945

"For conspicuous gallantry and intrepidity as Commanding Officer of the U.S.S. DRUM (SS-228), in action against enemy Japanese forces in the Pacific War Area during the SEVENTH War Patrol of that submarine, from 16 August to 6 October 1943. Pursuing highly aggressive tactics against enemy shipping in hostile waters, Commander McMahon delivered a series of brilliantly executed torpedo attacks which resulted in the sinking of 12,900 tons of shipping and, skillfully evading severe countermeasures which followed each attack, brought his ship safe back to port. His courage and devotion to duty were in keeping with the highest traditions of the United States Naval Service."

Commander Submarines Pacific: Serial 4415

Period:

Second World War (1939-1945)

Unit:

U.S.S. Drum (SS-228), U.S. Navy

Period:

Second World War (1939-1945)

Period:

Second World War (1939-1945)

Period:

Second World War (1939-1945)

Period:

Second World War (1939-1945)

Period:

Second World War (1939-1945)