1918 - Transylvania unites with Romania, following the incorporation of Bessarabia (March 27) and Bukovina (November 28). National Council of Romanians in Banat had voted for union with the Kingdom of Romania. National Council of Romanians in Transylvania had voted for union with the Kingdom of Romania.
1918 - Iceland becomes a sovereign state, yet remains a part of the Danish kingdom.
1918 - The Kingdom of Serbs, Croats and Slovenes (later known as the Kingdom of Yugoslavia) is proclaimed.
1919 - Lady Astor becomes first female member of the British Parliament to take her seat (she had been elected to that position on November 28).