 Complete the following phrase:  Brandenburg was torn apart by a quarrel between the Protestants and the Catholics. When Gustavus Adolphus began his push into northern Germany in JuneJuly 1630, he had just 4,000 troops. But he was soon able to consolidate the Protestant position in the north, using reinforcements from Sweden and money supplied by France at the Treaty of Bärwalde. Gustavus Adolphus was killed at the 