What was the British southern strategy?

During the American Revolution, the British "southern strategy" was devised as an alternative to their failed campaigns in central and northern America during the wars first three years. From 1778-1781, the British focused their efforts on occupying the more loyalist-tending southern American colonies and doing damage to the patriot cause from their. This strategy failed, with its dramatic conclusion coming at Yorktown in 1781 with a decisive patriot victory.