ORDER OF BATTLE // January 1, 1800
Second Italian Campaign
Estimated force strength by side, with confidence labels per surviving record.
Forces engaged
2 sides catalogued · combined 58,000 estimated
France
28,000
Medium-confidence figure
Habsburg monarchy
30,000
Medium-confidence figure
Battle context
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.
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