During World War I, many activists evacuated into Russia. In 1917, the right wing faction formed the Lithuanian Socialist Popular Democratic Party (Lithuanian: "Lietuvos socialistų liaudininkų demokratų partija"); another fraction formed the Lithuanian Socialist Popular Party (Lithuanian: "Lietuvos socialistų liaudininkų partija"). The LDP, which remained in Lithuania, was in essence inactive but still officially in existence. Two of its members, Jurgis Šaulys and Petras Vileišis, were elected to the Council of Lithuania, which adopted the Act of Independence of Lithuania in February 1918. The council ceased to exist in May 1920 when it was replaced by the Constituent Assembly of Lithuania. The LDP was formally dissolved on 15 May 1920.