The war started again in 1369. The new king Charles V of France was more successful, with Bertrand du Guesclin as his best knight. France allied with Castile against England and Portugal, and some of the fighting spilled into Spain and Portugal. France won back most of the land that had been given to the English, and Bertrand du Guesclin won great French victories at the battles of Cocherel and Pontvallain. A peace followed from 1389 to 1415. The second part of the war is called the Caroline War.