The siege of Valenza del Po in autumn 1635

After the withdrawal of the Swedes from the Thirty Years' War, France lost its ally to the Reich and now intervened militarily in the war. 1635 Cardinal Richelieu (1585 - 1642) decided to actively intervene in the military conflicts. Now it was no longer just a matter of confessional but also clearly of territorial interests. The fighting spread across all German territories.

With the forty-day siege of Valencia in the autumn of that year, France and its allies Parma and Savoy, led by Marshal de Crequi, tried in vain to attack a fortress of the Duchy of Milan that fought on the Spanish-Habsburg side. The troops stormed Valenza over fifty times and lost several thousand men before breaking off the siege.