The events happened on 13th March are :



1781 : The planet Uranus discovered : English astronomer William Herschel observed this day in 1781 the seventh planet from the Sun, Uranus—first described by him as “a curious either nebulous star or perhaps a comet” and named for the father of the god Saturn.



1986 : Soviet cosmonauts Leonid Kizim and Vladimir Solovyev were sent aloft aboard a Soyuz spacecraft to rendezvous with the space station Mir and become its first occupants.



1938 : The Anschluss, political union between Austria and Germany, was announced.



1884 : Al-Mahdī began the Siege of Khartoum, capital of the Sudan, which was defended by an Egyptian garrison under the British general Charles George (“Chinese”) Gordon.



1881 : Tsar Alexander II of Russia was assassinated in St. Petersburg.



1741 : The Holy Roman emperor Joseph II, who was at first coruler (1765–80) with his mother, Maria Theresa, and then acted as sole ruler (1780–90) of the Austrian Habsburg dominions, was born.



1642 : The marquis de Cinq-Mars, a favourite of King Louis XIII of France, signed a secret treaty with King Philip IV of Spain in a plot to overthrow Cardinal de Richelieu.



12th March | 14th March