What were the four consequenceces of the thirty years war?
The immediate consequence which led to the Thirty Year's War was the revolt of the Protestants of Bohemians who were unhappy with Ferdinand II because of his anti-Protestant policy. The trouble started when Ferdinand II ordered destruction of Protestant Church at Prague. The protestant people immediately rose in revolt, tossed the royal officers out of the castle windows and offered the crown to Frederick, Elector of Palatine. Ferdinand II treated the acceptance of the crown by Frederick as a direct challenge and the Thirty Years' War commenced in 1618.