After an assault by Turenne, Breisach capitulated, and all Alsace had now fallen into the hands of Saxe-Weimar.

Having been promised Alsace he refused, as Richelieu desired, to hand over Breisach to France; but on the death of the duke in the following year, Richelieu bought over his lieutenants, the French flag waved over the towns of Alsace, and the Upper Rhine became the French frontier.

Turenne returned to court, where he was received with enthusiasm, and was a short time afterwards ordered to Italy to assist De la Valette, who had been faring but badly there.
Matters had not gone there as Richelieu had calculated.

The Duke of Savoy remained true to his engagement with France, but he died in October, 1637.

The Spaniards had captured Vercelli, and the emperor had bestowed the regency of the duchy on the Cardinal of Savoy and on Prince Thomas, brother-in-law of the duchess.