Granby supported the government's issue of general warrants and prosecution of Wilkes, but in 1765 spoke against the dismissal of army officers for voting against the government in Parliament. In May 1765, Lord Halifax attempted to persuade George III to appoint Granby Commander-in-Chief of the Forces, in the hopes that his popularity would help quell the riot of the London silk weavers. The king refused, having promised the reversion of the post to the Duke of Cumberland, but obtained Granby's retention as Master-General of the Ordnance in the new Rockingham ministry, although Granby did not co-operate with the ministry and voted against the repeal of the Stamp Act.