Frederick William the Great Elector

Frederick William created the General War Commissariat, a centralized tax and military administration. This institution allowed him to maintain a standing army independent of noble estates, laying the foundation for Prussian militarism and absolutist rule.

Frederick William led Brandenburg-Prussian forces alongside Sweden to defeat the Polish-Lithuanian Commonwealth at the Battle of Warsaw. This victory secured his control over Ducal Prussia and demonstrated the military capability of his emerging state.

Frederick William signed the Treaty of Oliva, which ended the Second Northern War. The treaty confirmed his full sovereignty over Ducal Prussia, freeing it from Polish vassalage and establishing Brandenburg-Prussia as an independent European power.

Frederick William issued the Edict of Potsdam, inviting French Huguenot refugees to settle in Brandenburg-Prussia. This policy brought skilled artisans, merchants, and soldiers, boosting the economy and population, and strengthening the state's military and industrial capacity.