He urged Grouchy to join Napoleon at the Battle of Waterloo .
Grouchy preferred to pursue the Prussian 3rd Corps under General Johann von Thielmann , winning the Battle of Wavre , but losing the war .
He urged Grouchy to join Napoleon at the Battle of Waterloo , but Grouchy preferred to pursue the Prussian 3rd Corps under General Johann von Thielmann , winning the Battle of Wavre , but losing the war .