[NAPOLEON] BERTHIER, Relation de la bataille de Marengo, 1805

octavo edition .
The Battle of Marengo was a watershed moment in the Napoleonic Wars, pitting French forces led by Napoleon Bonaparte against the Austrian army commanded by General Michael von Melas. Berthier, as chief of staff, was responsible for coordinating troop movements, transmitting orders and information between the various army corps and the commander-in-chief (Napoleon) and managing logistics. and communication on the battlefield.