English and Spanish colonies in southeastern North America began coming into conflict as early as the middle of the 17th century. The Spanish population of Florida at the time was fairly small. Since its founding in the 16th century, the Spanish had set up a
network of missions whose primary purpose was to pacify the local Indian population and convert them to
Roman Catholicism. The founding by English colonists of 1670 of Charles Town (present-day
Charleston, South Carolina) in the recently established (1663)
Province of Carolina heightened tensions. In 1700, Carolina's governor,
Joseph Blake, threatened the Spanish that English claims to
Pensacola, established by the Spanish in 1698, would be enforced.
Pierre Le Moyne d'Iberville, the French founder of
Mobile, in January 1702, warned the Spanish commander at Pensacola that he should properly arm the
Apalachee Indians and engage in a vigorous defense against potential English incursions into Spanish territory. D'Iberville even offered equipment and supplies for that purpose. However, an attempt at a punitive expedition against the Creek
resulted in a rout of the Spanish and their Apalachee allies in October, shortly before news of war declarations bringing the English government into the
War of the Spanish Succession arrived. After a
failed Carolinian assault on
St. Augustine, Spanish mission towns were severely reduced by
numerous raids by combined Creek-Carolina raids against the Spanish mission network from 1703 to 1706. A French-organized
1706 expedition against Charles Town was a failure but motivated Carolina authorities to again target the Spanish at Pensacola and the French at Mobile. Nairne proposed a major expedition after the attack on Charles Town, intending to recruit as many as 1,500 Indians to capture Mobile, but political divisions in Carolina prevented execution of the plan. == First siege ==