On the 29th of March, 1531, the Protestants opened their second assembly at Smalcald. The league, though at first limited to Protestant electors, princes, and states, was now extended so as to include those, who, whatever might be their religious sentiments, were opposed to the Emperor, and protested against the election of Ferdinand. They also took measures to bring the kings of France, England, and Denmark, as well as other princes and states, into the Confederacy. The Dukes of Bavaria, and others who had not been present at the first meeting, now joined the league. Regulations were made for the levying of supplies and soldiers to be ready in case of need.