How did becoming duke of Mecklenburg change Albrecht von Wallenstein’s political goals?

Becoming the Duke of Mecklenburg in 1629 fundamentally transformed Albrecht von Wallenstein’s political trajectory. Previously a loyal servant of the House of Habsburg, Wallenstein shifted his focus toward pursuing an independent policy after receiving the duchy as a hereditary imperial fief.1

This new status altered his outlook in several key ways:

• Strategic Independence: He diverged from the Catholicizing goals of Emperor Ferdinand II and abandoned his earlier objective of establishing the emperor as the supreme ruler of Germany.1
• Diplomatic Shifts: He began engaging in political and economic discussions with Protestant neighbors, including Brandenburg, Pomerania, and the Hanseatic towns.1
• Policy Disagreements: He advised the emperor to offer Denmark lenient peace terms and strongly opposed the Edict of Restitution, which sought to restore Catholic ecclesiastical lands.1
• Maritime Ambitions: Influenced by his new role, he developed an interest in sea power and trade, attempting to establish a trading company to challenge Dutch and English dominance in the North and Baltic seas.1

Ultimately, this transition marked his evolution from an imperial generalissimo into a political actor seeking to exert his own influence over the empire's affairs.1