Cornwallis returned to America in July 1779, where he was to play a central role as the lead commander of the British "Southern strategy" (which was to invade the south on the assumption that a significantly more Loyalist population would rise up and assist in putting the rebellion down). At the end of 1779, Henry Clinton and Cornwallis transported a large force south and initiated the second siege of Charleston during the spring of 1780, which resulted in the surrender of the Continental forces under Benjamin Lincoln. After the siege of Charleston and the destruction of Abraham Buford's Virginia regiments at Waxhaw, Clinton returned to New York, leaving Cornwallis in command in the south. The relationship between Clinton and Cornwallis had noticeably soured during the Charleston campaign, and they were barely on speaking terms when Clinton left.