The southernmost post in Georgia was Fort Howe (previously known as Fort Barrington), on the banks of the Altamaha River, and the northernmost Florida outpost was at Fort Tonyn, in present-day Nassau County, Florida. East Florida Governor Patrick Tonyn had under his command a regiment of rangers led by Lieutenant Colonel Thomas Brown, and several hundred British Army troops under the command of Major General Augustine Prevost. Tonyn and Prevost squabbled over control of Brown's regiment, and disagreed on how the province should be defended against the recurring forays from Georgia. Prevost was under orders to stay on the defensive, while Tonyn sought a more vigorous defense. To that end Tonyn deployed Brown's force along the St. Marys River, which (then as now) formed the border. Brown and his men, sometimes with support from Creeks and Seminoles, engaged in regular raids into southern Georgia, harassing the defenders and raiding plantations for cattle to supply some of the province's food needs.