Operation Exporter. Allied troops make slow progress North out of Palestine. They capture a number of villages and small towns in Southwestern Syria. In Lebanon, the initially rapid advance of Australian 7th Division towards Beirut is slowed by blowing of bridges over the Litani River by the French defenders.
Operation Chronometer. Indian 3rd Battalion 15th Punjab Regiment lands at Assab, Eritrea. Assab is the last Italian Red Sea port, mainly held by assorted survivors retreating from various battles in Eritrea plus 5 batteries of coastal guns manned by the Navy.
In the Humber estuary, steamship Royal Scot hits an acoustic mine and sinks. Patrol vessel HMS Pintail assists but also sets off an acoustic mine, sinking immediately (55 killed, 22 rescued by destroyer HMS Quantock and another ship).
U-boats sink 3 freighters in the North Atlantic from the coast of Ireland to within 500 miles of the Canadian coast.
British submarine HMS Torbay attacks an Italian convoy 15 miles off the Gallipoli peninsula, Turkey, sinking steamer Giuseppina Ghirardi and hitting Utilitas with a torpedo that sticks in the hull but does not explode.