Countess Marie Sophie von Brühl ( June 31779 - 1836) was a member of the von Brühl noble family originating in Thuringia. On December 171810 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".
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