September 12, 1990Representatives of the World War II allies and West and East Germany sign a treaty in Moscow giving international sanction to German unity.

September 13, 1943Chiang Kai-shek becomes president of China. September 14, 1960

Indonesia, Iraq, Iran, Kuwait, Saudi Arabia and Venezuela form OPEC. Fuad Rouhani of Iran serves as its first secretary-general.

September 15, 1835HMS Beagle and Charles Darwin reach the Galapagos Islands, a scat