10th August 1918
Western Front
French retake Montdidier.
The First United States Army is formed in France under the command of General Pershing, as sufficient American manpower has arrived to the Western Front.
Naval
French troopship SS Polynesien is sunk by the German submarine SM UC-22, resulting in 19 deaths. The ship was carrying Serbian soldier Milunka Savić, one of the most decorated female soldiers in history, who survived.
Ship Losses:
Aleda May (United States) The fishing vessel was sunk in the Atlantic Ocean (41°45′N 67°10′W) by
SM U-117 ( Kaiserliche Marine). Her crew survived.
Cruiser (United States) The fishing vessel was sunk in the Atlantic Ocean (41°45′N 67°10′W) by
SM U-113 ( Kaiserliche Marine). Her crew survived.
Earl & Nettie (United States) The fishing vessel was sunk in the Atlantic Ocean (41°45′N 67°10′W) by
SM U-113 ( Kaiserliche Marine). Her crew survived.
Katie L. Palmer (United States) The fishing vessel was sunk in the Atlantic Ocean (41°45′N 67°10′W) by
SM U-113 ( Kaiserliche Marine). Her crew survived.
Madame Renee (United Kingdom) The coaster was torpedoed and sunk in the North Sea 1 nautical mile (1.9 km) north north east of Scarborough, Yorkshire by
SM UB-30 ( Kaiserliche Marine) with the loss of ten of her crew.
Mary E. Sennett (United States) The fishing vessel was sunk in the Atlantic Ocean (41°45′N 67°10′W) by
SM U-113 ( Kaiserliche Marine). Her crew survived.
Patra (France) The sailing vessel was sunk in the Mediterranean Sea off the Egyptian coast by
SM UC-34 ( Kaiserliche Marine).
Polynesien (France) The troopship was torpedoed and sunk in the Mediterranean Sea 7 nautical miles (13 km) off Valletta, Malta by
SM UC-22 ( Kaiserliche Marine) with the loss of nineteen lives.
Progress (United States) The fishing vessel was sunk in the Atlantic Ocean (41°45′N 67°10′W) by
SM U-113 ( Kaiserliche Marine). Her crew survived.
Reliance (United States) The fishing vessel was sunk in the Atlantic Ocean (41°45′N 67°10′W) by
SM U-113 ( Kaiserliche Marine). Her crew survived.
Tatarrax (United Kingdom) The tanker was torpedoed and sunk in the Mediterranean Sea off Rosetta, Egypt (32°00′N 30°45′E) by
SM UC-34 ( Kaiserliche Marine) with the loss of 61 lives.
William H. Starbuck (United States) The fishing vessel was sunk in the Atlantic Ocean (41°45′N 67°10′W) by
SM U-113 ( Kaiserliche Marine). Her crew survived.