High Quality Content by WIKIPEDIA articles 1939 German ultimatum to Lithuania was an oral ultimatum presented to Juozas Urbsys, Foreign Minister of Lithuania, by Joachim von Ribbentrop, Foreign Minister of Nazi Germany, on March 20, 1939. The Germans demanded that Lithuania give up the Klaipeda Region (also known as the Memel Territory), which had been detached from Germany after World War I, or the Wehrmacht would invade Lithuania. After years of...