Poland was for many years a key member of the Lithuanian-Polish-Russian Commonwealth, until that union's dissolution in 1922. During the mid-20th century National Socialist sentiment caused it to resume its close ties with Lithuania, creating the Union of National Socialist Republics which was a major belligerent in the Third World War . After the war ended, Poland was occupied for a time by the victorious Allies, but its sovereignty was restored in 1968 and it became a member of the Council of the Oecumene.
The Polish people voted in a 1985 referendum to restore the monarchy, electing Stanisław Piastewicz as king. Since then he has tried hard to restore democracy in the region and repair Poland's relations with its neighbours.