The decision in establishing an emperor’s successor would lead to a conflict that would spark the Thirty Years’ War. The Bohemian revolt initially started off in favor of the Bohemians, but it damaged diplomacy. Victory in this conflict for either side would hinge on the battle that would take place at White Mountain.
Beginnings of Bohemia: Borivoj I and the Premyslids
Bohemia's beginnings started with Svatopluk I of Great Moravia giving Borivoj I control of the of the soon-to-be Bohemian lands. Even early in his career as the first duke, his kingdom faced war as he supported Svatopluk I during his war against Louie the German and the Eastern Franks. Also early in his career, he faced controversy from fellow elites and had to involve himself in more war to maintain his power and position. Beginnings aren't easy!
Great Moravia: Mojmir I and Rostislav (830-870)
After the death of Samo, there was uncertainty about the Czech and Moravian lands, but after the rise of Charlamange of the Frankish Kingdom, Moravians were able to recover. The princes of Moravia consolidated their power, and one in particular Mojmir I, rose beyond tribal institutions to establish Great Moravia. After Mojmir I's deposition, his nephew Rostislav became Louis the German's loyal vassal. In secret, however, Rostislav had ambitions beyond this.