 On September 12, 1945, Lascăr was named commander of the Fourth Army.He was a leader of the Electoral Commission of the Army, in advance of the general election of November 19, 1946.After a coalition led by the Romanian Communist Party won the election (through widespread intimidation tactics and electoral fraud), he was appointed Minister of Defense, holding this ministerial portfolio from November 29, 1946 until December 27, 1947, when he was replaced by Emil Bodnăraș.