Great Siege of Gibraltar - Background

Background

In 1738 a dispute between Spain and Great Britain arose over commerce between Europe and the Americas. Initially, both sides intended to sign an agreement at the Spanish Royal Palace of El Pardo, but in January of the following year, the British Parliament rejected the advice of Foreign Minister Robert Walpole, a supporter of the agreement with Spain. A short time later, the War of Jenkins' Ear began, and both countries declared war on 23 October 1739, each side drawing up plans to establish trenches near Gibraltar. Seeing these first movements, Britain ordered Admiral Vernon to sail from Portobello and strengthen the squadron of Admiral Haddock who was already stationed in the Bay of Gibraltar.

The passage of years failed to break the hostilities in the region. Then on 9 July 1746, King Philip V of Spain died in Madrid. His successor, Ferdinand VI, soon began negotiations with Britain on trade. The British Parliament was amenable to such negotiations, and even looked favourably upon lifting the British embargo on Spain and possibly ceding Gibraltar. The neutrality adopted by Ferdinand VI quickly ended with his death in 1759. The new king, Charles III, was less willing to negotiate with Great Britain. Instead, he signed a Family Compact with the Louis XV of France on 15 August 1761. At that time France was at war with Britain, so Britain responded by declaring war on Spain and capturing the Spanish colonial capitals of Manila and Havana. Two years later, after cessation of hostilities, Spain recovered Manila and Havana in exchange for Spanish holdings in Florida as part of the 1763 Treaty of Paris.

In the years of peace that followed both France and Spain hoped for an opportunity to launch a war against Britain on more favourable terms and recover their lost colonial possessions. Following the outbreak of the American War of Independence, both states supplied funding and arms to the American rebels, and drew up a strategy to intervene on the American side and defeat Britain.

On 12 April 1779, France and Spain signed the Treaty of Aranjuez wherein they agreed to aid one another in recovering lost territory from Britain. Then in June 1779, Spain declared war on Great Britain, France having done so the year before. France and Spain sought to secure Gibraltar, which was a key link in Britain's control of the Mediterranean Sea, and expected its capture to be relatively quick—a precursor to a Franco-Spanish invasion of Great Britain.