Timeline of the occupation of the Baltic states

The timeline of the occupation of the Baltic states lists key events in the military occupation of the three countries – Estonia, Latvia and Lithuania – by the Soviet Union and by Nazi Germany during World War II. == 1939 == 20 March 1939, German ultimatum to Lithuania was an oral ultimatum presented to Juozas Urbšys, foreign minister of Lithuania, by Joachim von Ribbentrop, foreign minister of Nazi Germany. The Germans demanded that Lithuania give up the Klaipėda region (Memelland), or the Wehrmacht would invade Lithuania.

Source: Wikipedia — Timeline of the occupation of the Baltic states (CC BY-SA 4.0)