The signing in Moscow of a treaty on borders and friendship between the Third Reich and the USSR along with a secret protocol establishing the borders between the two countries. Three additional protocols were added to the agreement, the third one containing the following statement:
„Both parties will tolerate no Polish agitation in their territories which affects the territories of the other party. They will suppress in their territories all beginnings of such agitation and inform each other concerning suitable measures for this purpose.” (Secret Additional Protocol to German-Soviet Treaty on Borders and Friendship)
The signing of the act of the capitulation of Warsaw.