Countess Marie Sophie von Brühl (June 3, 1779 - 1836) was a member of the von Brühl noble family originating in Thuringia. On December 17, 1810 she married Carl von Clausewitz, whom she first met in 1803. She published several of his books in the years 1832-34 after his death in 1831, including his most famous one On War. Additionally, von Brühl wrote a preface to On War. June 3 is the 154th day of the year in the Gregorian calendar (155th in leap years), with 211 days remaining. ... 1779 was a common year starting on Friday (see link for calendar). ... 1836 was a leap year starting on Friday (see link for calendar). ... The Free State of Thuringia (German Freistaat Thüringen) lies in central Germany and is among the smaller of the countrys sixteen Bundesländer (federal states), with an area of 16,200 sq. ... December 17 is the 351st day of the year (352nd in leap years) in the Gregorian Calendar. ... 1810 was a common year starting on Monday (see link for calendar). ... Carl Phillip Gottlieb von Clausewitz (June 1, 1780 _ November 16, 1831) was a Prussian military thinker. ... 1803 was a common year starting on Saturday (see link for calendar). ...