Definition
The Bavarian campaign (1646–1647) was a Franco‑Swedish military operation directed against the Electorate of Bavaria during the final phase of the Thirty Years’ War. Its objective was to neutralise Bavaria as an active ally of the Holy Roman Emperor Ferdinand III and to improve the negotiating position of France and Sweden in the peace talks that would culminate in the Treaty of Westphalia.
Overview
In the autumn of 1646, Swedish commander Carl Gustav Wrangel joined forces with the French army under Marshal Henri de La Tour d’Auvergne, Vicomte de Turenne. The combined force, numbering roughly 15,000 Swedish infantry, 8,000 Swedish cavalry and an estimated 30,000 French troops, crossed into southern Germany and advanced into Bavaria. After a series of maneuvers that bypassed Imperial defensive lines along the Main and Nidda rivers, the allies seized key locations, including Rain‑am‑Lech, and laid siege to Augsburg, which ultimately resisted. The campaign continued through the winter, with Swedish forces penetrating further into Bavarian territory and capturing the fortified town of Bregenz on the shores of Lake Constance.
The campaign stalled when France concluded the Truce of Ulm with Bavaria on 14 March 1647, compelling the French army to withdraw. Swedish forces, unable to continue without French support, retreated to winter quarters in Swabia and around Lake Constance. The Truce of Ulm temporarily halted hostilities in the region, although it was later broken when Bavaria re‑aligned with the Imperial coalition.
Etymology / Origin
The term “Bavarian campaign” derives from the geographic focus of the operation—the Electorate of Bavaria—combined with the chronological designation of the campaign’s primary period (1646–1647). In contemporary sources the campaign is referred to in Swedish as Bayerska fälttåget and in French as Campagne de Bavière.
Characteristics
- Belligerents: Swedish Empire and Kingdom of France (allied) versus the Holy Roman Empire and the Electorate of Bavaria (Imperial side).
- Commanders: Carl Gustav Wrangel (Sweden) and Marshal Turenne (France) shared joint command, alternating weeks of leadership. Bavarian forces were overseen by Imperial Generalissimo Leopold William and the Bavarian commander Gottfried Huyn von Geleen.
- Strength: Approximately 23,000 Swedish troops (15,000 infantry, 8,000 cavalry) supported by 30,000 French soldiers; Imperial‑Bavarian forces fielded around 30,000 men.
- Operations: Rapid movement through western Bavaria, occupation of strategic towns, siege of Augsburg, capture of Bregenz, and extensive ravaging of the countryside to pressure the Bavarian Elector.
- Outcome: The campaign concluded with the Truce of Ulm (March 1647), leading to a temporary cease‑fire and the occupation of large swathes of Bavarian territory by allied forces. No decisive battle was fought, and casualties on both sides remain unspecified.
- Strategic Significance: The operation demonstrated the effectiveness of Franco‑Swedish coordination and placed diplomatic pressure on the Imperial coalition, influencing the broader negotiations that produced the 1648 Peace of Westphalia.
Related Topics
- Thirty Years’ War (1618–1648)
- Truce of Ulm (1647)
- Marshal Turenne’s campaigns
- Carl Gustav Wrangel’s military career
- Peace of Westphalia
- Electorate of Bavaria in the Thirty Years’ War
- Franco‑Swedish alliance (1640s)
Accurate information is drawn from contemporary historical accounts and the Wikipedia entry “Bavarian campaign (1646–1647).”