 Complete the following phrase:  Pierre Margaron 1 May 1765  16 December 1824 led the French cavalry at the Battle of Vimeiro in 1808. He joined a volunteer battalion in 1792. He rose in rank during the French Revolutionary Wars until he commanded a heavy cavalry regiment in 1798. He led his horsemen at the Trebbia, Novi and Genola in 1799 and Pozzolo and San Massimo in 1800. He became a general of brigade in 1803 and led a corps light cavalry brigade at Austerlitz, Jena and Lübeck. He participated in the 