The Battle of Fismes: Disrupted River CrossingExpansion

From BoardGameGeek:

After dispatching Blücher's Army of Silesia at Vauchamps, Napoleon diverted temporarily toward the Seine at Montereau, for an inconclusive brush with Schwarzenberg's Army of Bohemia. His inveterate foe Blücher apparently had learned no lessons and threatened to move again on Paris. By March 3rd Napoleon was returning northward along the bank of the Ourcq River. The fall of Soissons, cheaply surrendered by General Moreau, saw the quarry escape over the Aisne River to link-up with 43,000 reinforcements near Laon, raising his strength to over 100,000. Fismes is a hypothetical engagement simulating a possible battle at this river Crossing on March 4th 1814.