French Revolution
The aftermath of the 1789 French Revolution unusually saw Britain and Spain as allies for the first time in well over a century. After King Louis XVI of France was executed in 1793 Britain joined Spain in a growing coalition of European states trying to invade France and defeat the revolution. The coalition suffered a number of defeats at the hands of the French and soon broke up. Spain, influenced by the pro-French Manuel de Godoy, made peace in 1795 while Britain continued to fight on.

In 1796 Spain signed the Treaty of San Ildefonso and aligned with the French against the British