From Moscow... The Soviet Union formally annexes Estonia, Latvia and Lithuania and they become constituent republics of the USSR.

In Berlin... In an OKH conference Hitler again says that Germany must prepare to attack the USSR. Although the generals would prefer to deal with Britain first, they raise no objections. Later in the month Jodl tells an OKW planning section that Germany will attack in the east in the spring of 1941 and that planning for the movement of the armed forces to eastern Europe should be begun.