In 1664, he was appointed Lord High Constable of the realm, and as such, he was a member of the Privy Council during the minority of King Charles XI of Sweden. During the Wars for Bremen, he tried to win the city of Bremen for the Swedish crown but was not successful. On 15 November 1666, he was forced to make peace and concluded the Peace of Habenhausen. During the Scanian War, Wrangel commanded ineffectively because of his broken health and was recalled after his stepbrother, Baron Waldemar Wrangel (1647–1676), had been defeated at Fehrbellin during the Swedish invasion of Brandenburg.