Victor Amadeus I was the Duke of Savoy and ruler of the Savoyard states from 26 July 1630 until his death in 1637. He was also known as the Lion of Susa.

The War of the Mantuan Succession (1628–1631) was a conflict related to the Thirty Years' War and was caused by the death in December 1627 of Vincenzo II, the last male heir in the direct line of the House of Gonzaga and the ruler of the duchies of Mantua and Montferrat. Those territories were key to control of the Spanish Road, an overland route that allowed Habsburg Spain to move recruits and supplies from Italy to their army in Flanders. The result was a proxy war between France, which supported the French-born Duke of Nevers, and Spain, which backed a distant cousin, the Duke of Guastalla.