Treaty of The Hague (1625)

The Treaty of The Hague (1625) was a treaty signed on March 3, 1625, between England, Denmark, and the Dutch Republic during the Thirty Years' War. The primary objective of the treaty was to support Christian IV of Denmark’s military intervention in the Holy Roman Empire against the Catholic League, led by Emperor Ferdinand II.

England, under King Charles I, and the Dutch Republic, contributed financially and militarily to aid Christian IV's campaign. The treaty stipulated that England and the Dutch Republic would subsidize Denmark's efforts to maintain an army in the field. The subsidies were intended to bolster the Protestant cause in the war and to prevent Habsburg dominance in Northern Europe.

However, the intervention of Christian IV ultimately proved unsuccessful, culminating in his defeat at the Battle of Lutter in 1626. This defeat significantly weakened the anti-Habsburg alliance and shifted the momentum in favor of the Catholic League. While the Treaty of The Hague aimed to provide essential support, the subsequent events demonstrated the limitations of the alliance's ability to effectively challenge the power of the Habsburgs.