The Great Napoleonic Empire

Waterloo
During the battle of Waterloo the point of divergence when Grouchy arrived before Blucher, and Napoleon succesfully crushed Wellington. Then Napoleon went on to defeat Blucher at Bulzwalzer, 3 days later. This allowed for the Survival of Imperial France. Blucher was killed at Bulzwalzer when he was hit by a cannon ball. Wellington returned home in disgrace.