The Battle of Günzburg on October 9, 1805, sees General of Division Jean-Pierre Firmin Malher's French division attempt to seize a crossing over the Danube River at Günzburg in the face of a Habsburg Austrian army led by Feldmarschall-Leutnant Karl Mack von Lieberich.

Malher's division manages to capture a bridge and hold it against Austrian counterattacks.

The battle occurs during the War of the Third Coalition, part of the larger Napoleonic Wars.

After Mack's Austrian army invades Bavaria, it finds itself the target of a powerful offensive by the army of Emperor Napoleon I of France.

When Napoleon's corps threatens to envelop Mack's army, the Austrian general unwisely holds his ground near the city of Ulm.

As the French armies block the Austrian retreat routes to the east, Mack attempts to move his army to the south bank of the Danube.

After receiving orders to seize the Danube bridges, Marshal Michel Ney sends Malher to capture the crossing at Günzburg.

Malher's main attack on two bridges failsin the face of a vigorous Austrian defense.

However, a late-arriving French unit captures the eastern bridge that had just been rebuilt by the Austrians and is able to hold on to it until evening.

Discouraged by the encounter, Mack orders his soldiers to march back to Ulm, which is twenty-two kilometers west-southwest of Günzburg.