On the Eastern Front… German General Hoth's 4th Panzer Army reach the Don River near Voronezh. To their left, General Weich's 2nd Army makes progress against the Soviet defenders.

In the Arctic… Without defensive escorts 13 vessels from the British convoy PQ-17 are sunk by Luftwaffe and U-boat attacks. The German heavy ships approach, but return to port when their presence is made unnecessary by the success of the air and submarine attacks. The sister convoy QP-17 sails into an Allied minefield in the Denmark Straits and loses 4 ships.