December 15th, 1940 (SUNDAY)
UNITED KINGDOM: Destroyer HMS Cameron (one of the 50 US leases) is severely damaged by German bombing whilst in dry dock at Portsmouth. She topples over and is considered to be beyond repair and broken up. There are no casualties. (Alex Gordon)(108)
Submarine HMS P-32 launched.
GERMANY: The Germans release the 
papers (summaries of British CoS reports) captured by the raider Atlantis on
November 11 to the Japanese. (Daniel Ross)
    
    MEDITERRANEAN SEA: Free French
Submarine FFL Narval mined off Tunisia. 
    
    TURKEY: The Uruguayan registered vessel MV 
Salvador, carrying refugee Bulgarian Jews who are desperately attempting to 
reach Palestine, sailed from Constanza in Romania and miraculously reached 
Istanbul. The vessel is built to carry between 30-40 passengers but on this 
journey she is carrying 327. There are no cabins, bunks or life-jackets, the 
passengers packed in like sardines, standing room only. After departing Istanbul 
the dilapidated ship is caught in a severe storm while crossing the Sea of 
Marmara, the inland sea that connects the Black Sea to the Aegean Sea, thus 
separating the Asian part of Turkey from its European part. The ship sinks 
taking the lives of 204 passengers including 66 children. There are 123 
survivors. 
NORTH AFRICA:
    Imperial troops cross the frontier into Libya.
    The British take in a surprise raid the Halfaya Pass on the Libyan-Egyptian border. The
    remnants of the Italian Tenth Army withdrew to the fortress of Bardia. The Italians now
    reinforce the defences of Tobruk and the El Mekili-Derna line, where they station three
    divisions which they have summoned from the interior.
    ATLANTIC OCEAN:
    Italian submarine R. Smg. 'Tarantini' is torpedoed and sunk by submarine HMS/M Thunderbolt 
(N 25) in the
    Bay of Biscay as she returns from North Atlantic patrol. Location: About 459 
nautical miles (850 kilometers) north-northeast of Lagens Field, Azores, in 
position 45.25N, 22.00W.The
T-class submarine HMS Thunderbolt is the recomissioned/renamed HMS Thetis which
failed to surface from its first submerged test trial in Liverpool Bay on  1st.
June 1939. (Alex Gordon)