BATTLE // January 1, 1800

Second Italian Campaign

Name: Second Italian Campaign
Start: 1800-01-01
End: 1800-01-01
Location: Second Italian Campaign

Significance

The Second Italian Campaign (the Marengo campaign) decided control of northwest Italy and forced the Habsburg army out of the region through a combination of strategic encirclement and a climactic pitched battle. After Austrian General von Melas split the French Army of Italy and besieged Massena's forces in Genoa, Bonaparte answered by crossing the Great St Bernard Pass with the Reserve Army and seizing Milan, cutting Habsburg supply lines between Melas and Austria rather than driving directly to relieve Genoa. Genoa fell, but Melas now found his army isolated in northwest Italy. His attempted breakout at the Battle of Marengo on 14 June 1800 nearly succeeded, exploiting Bonaparte's overextended dispositions, but late-arriving French forces reversed the engagement. The result was a negotiated truce under which Melas evacuated northwest Italy entirely, restoring French dominance over the region and substantially weakening Habsburg strategic position in the War of the Second Coalition.

Tactics

Bonaparte crossed the Great St Bernard Pass in mid-May and descended into the Aosta Valley, where a serious delay at Fort Bard slowed his advance before his forces broke into the Po Valley plains. Rather than taking the direct route to Genoa blocked by Melas at Turin, Bonaparte seized Milan and moved to sever Habsburg supply lines between the Austrian army and Austria itself. This maneuver isolated Melas in northwest Italy. At the Battle of Marengo, Bonaparte spread his army too thin, allowing Melas to nearly break out of the encirclement; late-arriving French troops ultimately defeated the Austrians and secured the campaign's outcome.