A letter containing an outline of Napoleon's plan of action is captured by his enemies.

The Coalition commanders had held a council of war at Pougy on March 23 and initially decided to follow Napoleon, but the next day Tsar Alexander I of Russia and King Frederick of Prussia, along with their advisers, reconsider, and realizing the weakness of their opponent, decide to march to Paris (now an open city), and let Napoleon do his worst to their lines of communications.