sentences:  1939; Latvia following on October 5, 1939; and Lithuania shortly thereafter, on October 10, 1939.In Latvia's case it was signed by Latvian Minister of Foreign Affairs Vilhelms Munters and Soviet Commissar of Foreign Affairs Vyacheslav Molotov.Ratifications were exchanged in Riga on October 11, 1939, and the treaty became effective on the same day.