Gustavus Adolphus helped whom?

Gustavus Adolphus, the King of Sweden from 1611 to 1632, is widely recognized for his significant role in the Thirty Years' War, particularly in support of the Protestant cause. His intervention in this devastating conflict was motivated by both religious and political aims.

By the time he entered the war, Protestant states in the Holy Roman Empire were facing dire challenges against the powerful Catholic forces led by the Habsburgs. Gustavus Adolphus sought to bolster the Protestant factions in Germany, not only to uphold their religious freedoms but also to expand Sweden's influence and territory in northern Europe.

His military innovations, such as the use of mobile artillery and coordinated infantry tactics, allowed him to achieve notable victories against Catholic armies, which helped to shift the balance in favor of the Protestant states. His leadership and strategies were pivotal in establishing Protestantism's presence and securing some level of religious tolerance in the region, significantly impacting the outcome of the Thirty Years' War.

Thus, Gustavus Adolphus is correctly associated with his support for the Protestants during this critical period in European history.