The seeds of conflict began with the separation of an ear from Jenkins following the boarding of his vessel by Spanish coast guards in 1731, Seven years before the war began. Popular response to the incident was tepid until several years later when opposition politicians and the British South sea company hoped to spur outrage against Spain, believing that a victorious war would improve Britain's trading opportunities in the Caribbean.
Also ostensibly providing the impetus to war against the Spanish Empire was a desire to pressure the Spanish not to renege on the lucrative
asiento contract, which gave British slavers permission to sell slaves in the Spanish Colonies.
But how Georgia got into the situation it is now you need to know the background.
At the closing of the War Of Spanish Succession in 1713 the Treaty of Utrecht gave Britain a thirty year contract right to supply an unlimited number of slaves to the Spanish colonies. This provided British merchants an opening to smuggle goods into the closed markets of The Spanish Viceroyaltys of New Spain, Peru and New Granada.
But Britain and Spain were often at war during this period, fighting one another in the
War of the Quadruple Alliance (1718–20), the
Blockade of Porto Bello (1726) and the
Anglo-Spanish War (1727–1729).
The Treaty of Seville Britian gave Spanish ships the right to stop and search British ships. That were shipping slaves to the Viceroyaltys to make shure the contract was being obeyed and respected.
Over time, the Spanish became suspicious British traders were abusing the contract and began to board ships and confiscate their cargoes. After very strained relations between 1727 and 1732, the situation improved between 1732 and 1737, Sir Robert Walpole supported Spain in the War of Polish succession.
But the cause of the problems remained and as opposition to Walpole grew so did Anti-Spanish sentiment. Eventually Walpole gave in and sent warships to the British West Indies. This invoked an immediate reaction from Spain who demanded financial compensation, and in turn the British demanded annulment of the "Visitation Right" which allowed the Spanish to board British vessels to check for smuggled cargo which was agreed to in the Treaty of Seville.
In response King Phillip V of Spain annulled the Contract rights in all Spanish Harbors and had all British ships confiscated.
While the attempted Convention of Pardo broke down early in talks. Britain decided it did not want to wait for another shot at war and withdrew its ambassador and declared war on December,7,1738.
(P.O.D in our timeline the convention didn't brake down)