In February, 1781, the enemy's army in Virginia became such a source of terror to the people of that section that General Allen Jones was ordered to reinforce Gregory with troops from the Halifax District. But later that same month a greater danger confronted the patriot army in the South, and this order was countermanded. Most of the forces in the States were now hurried to the aid of General Greene, who had superseded Gates after the battle of Camden, and was leading Cornwallis an eventful chase across the Piedmont section of North Carolina. Cornwallis, after having been reinforced by General Leslie, had planned to invade North Carolina, conquer that State, march through Virginia and join Clinton in a fierce onslaught against Washington's army in the North. To foil the plans of the British officers Greene was concentrating the patriot troops in the South in the Catawba Valley, and Gregory was left with only a handful of men to hold the enemy at Norfolk in check. In June, General Gregory's situation was so desperate that the Assembly again ordered General Allan Jones to send 400 men from Halifax District to North West Bridge to reinforce Gregory; and the latter officer was authorized to draft as many men as possible from the Edenton District. General Jones informed the Assembly that he would send the troops as soon as possible, but that Gregory would have to provide arms, as he had no means of furnishing equipments for them. Several engagements took place in June between the British and Americans in the Dismal Swamp region, and in one of them Gregory was repulsed and driven from his position. But in July he wrote to Colonel Blount reporting that his losses were trifling, and that he had regained his old post from the enemy. In August, 1781, a letter from General Gregory conveyed the joyful tidings that the enemy had evacuated Portsmouth. As his troops were no longer needed to guard against the danger of invasion from that direction, and as smallpox had broken out in his camp, General Gregory now released his men from duty, and they returned to their homes. The British army that had just left Portsmouth, was now on its way to Yorktown, whither Cornwallis, after his fruitless chase of Greene, his disastrous victory at Guilford Courthouse, and his retreat to Wilmington, was now directing his army. There on the 19th of October the famous Battle of Yorktown was fought and Cornwallis and his entire army forced to surrender.