sentences:  Elcho raised a troop of 'Lifeguards,' the best equipped cavalry unit in the Jacobite Army, who served as Charles' personal escort throughout the campaign.However, the decision to retreat from Derby on 5 December caused an irrevocable breach between the Prince and his Scottish supporters, including Elcho.At Culloden in April 1746, the Lifeguards escorted Charles from the battlefield, who then dismissed them, as he now trusted only the Irish exiles.