 Complete the following phrase:  Early in 1621 the Protestant union was broken up, and the English garrisons had to give up all hope of relief. The English governors were not closely pressed that year. The garrison under Vere at Mannheim received a visit early in 1622 from the dethroned elector, who had promised them a diversion, and who, in conjunction with Mansfelt, had inflicted a momentary check upon the imperialist army under Johann Tserclaes von Tilly at 