Complex sentence: Pierre d'Alcantara Charles, was born on 2 October 1790; entered early in the service of France, he distinguished himself during the campaigns in Spain and followed the Emperor Napoleon in Russia, as an officer of ordinance.
Split into simpler sentences: Pierre d'Alcantara Charles, was born on 2 October 1790; entered into the service of France. He distinguished himself during the campaigns in Spain and followed the Emperor Napoleon the Russian campaign, as an officer of ordinance.