The losing side of this campaign burned Fort St. Simon before being ambushed on a march up Military Road, resulting in their defeat at Gully Hole Creek.
Note: description acceptable. The first shots fired in this campaign came from the guns of Fort William and George Dunbar's schooner Walker after the enemy fleet entered Cumberland Sound. The winning commander of this campaign was reported dead by a Lieutenant Tolson, who was subsequently arrested for cowardice. The losing side of this campaign burned Fort St. Simon before being ambushed on a march up Military Road, resulting in their defeat at Gully Hole Creek. The British commander followed up that success with reinforcements from Fort Frederica, and subsequently won the Battle of Bloody Marsh, which ended this failed offensive. Because of this campaign's failure, the potential use of runaway slaves as soldiers by the losing side was diminished, allowing slavery to expand into a certain territory, despite the wishes of the victorious commander, James Oglethorpe. For 10 points, name this offensive campaign from the War of Jenkins's Ear, launched from St. Augustine, Florida, against the British colony to the north. 
Note: description acceptable. The first shots fired in this campaign came from the guns of Fort William and George Dunbar's schooner Walker after the enemy fleet entered Cumberland Sound.
Spanish Invasion of Georgia [accept logical equivalents that include "Spanish" and "Georgia"; accept descriptions like "Oglethorpe's Defense of Georgia" before he is named, prompt after; accept "Battle of Gully Hole Creek" or "Battle of Bloody Marsh" before they are named; prompt on "War of Jenkins's Ear" until it is mentioned]