1945.
2594 CE
In 1994 Brunei became the 139th county to join UN after its Independance from British Colonial Rule.
Libya joined the UN on September 18th, 1990.
1955
December 9, 1966
Italy joined the Allied powers because they promised better rewards from the spoils of the war in terms of being granted conquered territories. Italy initially had an agreement with the Central Powers.
Italy join the Six Nations Championship in 2000
CLOBIA
Italy joined NATO in 1949.
It officially sent troops in 1963. It had been supplying materiel and providing military advisers from 1961.
In WWII, Germany took over France in 1940. Italy wasn't involved, it didn't join the war until 1941.