Napoleon brought in the reserve corps and defeated the Austrians at Marengo .
In Spring 1800 , while Moreau wrecked Austrian defenses in Germany , Massena and Desaix ran into stiff Austrian offensives in Northern Italy .
Napoleon brought in the reserve corps and defeated the Austrian at Marengo .
In Spring 1800 , while Moreau wrecked Austrian defenses in Germany , Massena and Desaix ran into stiff Austrian offensives in Northern Italy .