 This was eventually agreed on 14 March 1647.However, when Douglas returned to Sweden in June to brief the Riksråd on the progress of negotiations he delivered the news that the Bavarian truce had effectively expired.For his good offices as both soldier and negotiator, Douglas was promoted to the rank of lieutenant general at which station he saw out the remainder of the war, seeing his last main action at Zusmarshausen in May 1648.