Long Essay: Why was Napoleon so successful as a military commander until 1806? Napoleon was born on 15th August 1769 and died on 5th May 1821. He was considered by most historians as one of the greatest military minds in the history of warfare. However his success as a military commander was limited by his personality and his choice of generals. He expanded the conquests of France from her revolutionary borders to that of an Empire that stretched from Spain to the steppes of Russia. Napoleon's