1917 October Revolution: In Tallinn, Estonia, Communist leader Jaan Anvelt leads revolutionaries in overthrowing the Provisional Government (As Estonia and Russia are still using the Julian Calendar, subsequent period references show an October 23 date).
1940 The United States' Under Secretary of State Sumner Welles issues a declaration on the U.S. non-recognition policy of the Soviet annexation and incorporation of three Baltic States: Estonia, Latvia and Lithuania.
1949 The extensive deportation campaign known as March deportation is conducted in Estonia, Latvia and Lithuania to force collectivisation by way of terror. The Soviet authorities deport more than 92,000 people from the Baltics to remote areas of the Soviet Union.
1988 The Supreme Soviet of the Estonian SSR declares that Estonia is "sovereign" but stops short of declaring independence.
1991 Estonia, annexed by the Soviet Union in 1940, issues a decision on the re-establishment of independence on the basis of historical continuity of her pre-World War II statehood.
2002 Enlargement of the European Union: The European Union announces that Cyprus, the Czech Republic, Estonia, Hungary, Latvia, Lithuania, Malta, Poland, Slovakia, and Slovenia will become members from May 1, 2004.
2003 In a referendum, Estonia approves joining the European Union.
2006 Estonia ratifies the European Constitution.