Sweden was not able to support Magdeburg, and in the summer of 1631, the town was taken and looted by Johann Tserclaes, Count of Tilly's forces. When a fire destroyed what was left of the town, and 20,000 inhabitants were burned, the Protestants' scepsis turned into support for the Swedish king. When Tilly attacked the Electorate of Saxony, the Saxon electors joined their forces with the Swedish army, and the combined forces decisively defeated Tilly in the Battle of Breitenfeld (1631). This defeat of the combined imperial and Catholic League forces allowed Sweden to pursue deep into Central and Southern Germany.