The Seven Years' War (1756–1763) was a global conflict between Great Britain and France for global pre-eminence. Britain, France and Spain fought both in Europe and overseas with land-based armies and naval forces, while Prussia sought territorial expansion in Europe and consolidation of its power. Long-standing colonial rivalries pitting Britain against France and Spain in North America and the West Indies were fought on a grand scale with consequential results.

Fearing that Britain's victory over France in the Seven Years' War (1756–63) threatened the European balance of power, Spain allied itself to France and invaded Portugal, a British ally, but suffered a series of military defeats and ended up having to cede Florida to the British at the Treaty of Paris (1763) while gaining Louisiana from France. Spain regained Florida with the Treaty of Paris (1783), which ended the American Revolutionary War (1775–83), and gained an improved international standing.

Spain entered the war in 1761, joining France in the Third Family Compact between the two Bourbon monarchies. The alliance with France was a disaster for Spain, with the loss to Britain of two major ports, Havana in the West Indies and Manila in the Philippines, returned in the 1763 Treaty of Paris between France, Spain and Great Britain.