Bernard's Upper Rhine Campaign

Bernard's Upper Rhine Campaign
Part of the Thirty Years' War
DateFebruary 1638 to December 1638
Location
Result French-Weimaran victory
Belligerents
 France
Weimar Army
Holy Roman Empire
 Bavaria
Lorraine
Commanders and leaders
Bernhard of Saxe-Weimar
Friedrich Ludwig Kanoffski von Langendorf
Georg Christoph von Taupadel
Reinhold von Rosen
Wilhelm Otto von Nassau-Siegen (WIA)
Ludwig von Wietersheim 
Count of Wittgenstein (WIA)
Johann Ludwig von Erlach
Sigismund von Erlach
Johann Bernard Ohm
Johann Phillip von Salm-Kyrburg (DOW)
Vicomte de Turenne
Jean-Baptiste Budes Comté de Guébriant
Henri de Rohan
Federico Savelli
Hans Heinrich von Reinach 
Guillaume de Lamboy
Johann von Werth (POW)
Johann von Götz
Adrian von Enkevort (POW)
Claus Dietrich von Sperreuth (POW)
Charles de Lorraine
Anne-François de Bassompierre (POW)
Colonel Vernier (POW)
Lieutenant Colonel Fleckenstein (POW)
Strength
5,000–6,000 men, 14 guns
13,000
4,800
c. 14,000–19,000
4,000–7,000 men
18,500
4,000
c. 20,000
3,000 men and 152 Cannons
Casualties and losses
5,400+ killed, wounded, and captured 2,400 – 6,400 killed
4,500+ – 8,500+ captured

Bernard's Upper Rhine Campaign was a successful military campaign by Bernard of Saxe-Weimar, who led an Army hired by the French to fight against the Holy Roman Emperor Ferdinand III. The campaign was fought from February to December 1638, mainly at four engagements at Rheinfelden, Wittenweiher, Thann, and Breisach, where Bernard won all four battles.

The campaign was first primarily fought for the forest towns in Baden-Württemberg, but then shifted to Breisach and Alsace. It was a decisive victory for the French and established their main base for their future German Campaigns at Breisach, further consolidated French control over Alsace, and isolated the Spanish Franche-Comté from its Imperial Spanish allies.

Only months after the campaign, Bernard died of a fever, a complication of an ear infection. Bernard's death finally led to the incorporation of the Weimar Army into the French Army of Germany (1638–1648). Most of the gains of the campaign was lost at the Battle of Tuttlingen, in which the French-Weimaran Army of Germany was mostly destroyed.