Answer:
1519: Reformist zeal sweeps the south. ...
1520: Rome flexes its muscles. ...
1521: Luther stands firm at Worms. ...
1525: Rebels are butchered in their thousands. ...
1530: Protestants fight among themselves. ...
1536: Calvin strikes a chord with reformers. ...
1555: Charles V brokers an uneasy peace with Lutherans.