Romania and Bulgaria signed the European Union’s Treaty of Accession, the last step to joining the Union.
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The Peloponnesian war came to an end when Admiral Lysander and his Spartan armies defeated their Athenian foes.
Francis Crick & James Watson's discovery of the double-helix structure of DNA was formally announced.
President Harry Truman opened the two-lane White House bowling alley.
The Chongzhen Emperor died by suicide during a peasant rebellion.
Germany banned the denial of Nazi genocide against Jewish people during the Holocaust.
