During the course of this year there were many skirmishes round New York, but nothing of any great importance took place. Sir Henry Clinton, who was in supreme command, was unable to undertake any offensive operations on a large scale, for he had not received the re-enforcements from home which he had expected. England, indeed, had her hands full, for in June Spain joined France and America in the coalition against her and declared war. Spain was at that time a formidable marine power, and it needed all the efforts that could be made by the English government to make head against the powerful fleets which the combined nations were able to send to sea against them. It was not only in Europe that the Spaniards were able to give effective aid to the allies. They were still a power on the American continent, and created a diversion, invading West Florida and reducing and capturing the town and fort of Mobile.
In the spring of 1780 Sir Henry Clinton sent down an expedition under the command of Lord Cornwallis to capture Charleston and reduce the State of South Carolina. This town was extremely strongly fortified. It could only be approached by land on one side, while the water, which elsewhere defended it, was covered by the fire of numerous batteries of artillery. The water of the bay was too shallow to admit of the larger men-of-war passing, and the passage was defended by Fort Moultrie, a very formidable work. Admiral Arbuthnot, with the Renown, Romulus, Roebuck, Richmond, Blonde, Raleigh, and Virginia frigates, with a favorable wind and tide ran the gantlet of Fort Moultrie, succeeded in passing up without great loss, and co-operated on the sea face with the attack of the army on the land side.
A force was landed on Sullivan's Island, on which Fort Moultrie stood, and the fort, unprepared for an attack in this direction, was obliged to surrender. The American cavalry force which had been collected for the relief of the town was defeated by the English under General Tarleton. The trenches were pushed forward with great vigor, and the batteries of the third parallel opened at short range on the town with great execution. The advances were pushed forward at the ditch, when the garrison, seeing that further resistance was impossible, surrendered. Five thousand prisoners were taken, 1000 American and French seamen, and ten French and American ships-of-war.
With the fall of Charleston all resistance ceased in South Carolina. The vast majority of the inhabitants made their submission to the British government and several loyalist regiments were raised.
Colonel Tarleton, with 170 cavalry and 100 mounted infantry, was dispatched against an American force under Colonel Burford, consisting of 350 infantry, a detachment of cavalry, and two guns, which had taken post on the border of North Carolina. Tarleton came up with him, and after a sharp action the Americans were entirely defeated. One hundred and thirteen were killed on the spot and 207 made prisoners, of whom 103 were badly wounded.
For some months the irregular operations were continued, the Americans making frequent incursions into the Carolinas. The British troops suffered greatly from the extreme heat and the unhealthiness of the climate.
In August the American General Gates advanced toward Camden, and Lord Cornwallis also moved out to that town, which was held by a British garrison. The position there was not hopeful. Nearly 800 were sick, and the total number of effectives was under 2000, of whom 500 were provincials. The force under General Gates amounted to 6000 men, exclusive of the corps of Colonel Sumpter, 1000 strong, which were maneuvering to cut off the English retreat. Cornwallis could not fall back on Charleston without abandoning the sick and leaving all his magazines and stores in the hands of the enemy, besides which a retreat would have involved the abandonment of the whole State with the exception of Charleston. He therefore decided upon giving battle to the enemy, who were posted at Rugeley's Mills, a few miles distant, leaving the defense of Camden to Major M'Arthur, with some provincials and convalescent soldiers and a detachment of the Sixty-third Regiment, which was expected to arrive during the night.
The army marched in the following order: The first division, commanded by Lieutenant Colonel Webster, consisting of four companies of light infantry and the Twenty-third and Thirty-third regiments, preceded by an advanced guard of 40 cavalry. The second division, consisting of provincial troops and two battalions of the Seventy-first Regiment, followed as a reserve. The dragoons of the legion formed the rear guard. The force marched at ten o'clock on the night of August 16, intending to attack at daybreak the next morning, but it happened that at the very same hour in which the British set out, General Gates, with his force, was starting from Rugeley's Mills with the intention of attacking Camden in the morning.
At two o'clock in the night the advanced guards of the two armies met and fired into each other. In the confusion some prisoners were taken on both sides, and the generals, finding that the two armies were face to face, halted and waited till morning. Lord Cornwallis placed Webster's division on the right; the second division, which was under the command of Lord Rawdon, on the left; the battalion known as the Volunteers of Ireland were on the right of Lord Rawdon's division and communicated with the Thirty-third Regiment on the left of Webster. In the front line were two six-pounders and two three-pounders under the command of Lieutenant Macleod, R. A. The Seventy-first, with two six-pounders, was in reserve, one battalion being placed behind each wing. The dragoons were held in reserve, to charge in the event of a favorable opportunity.
The flanks of the English position were covered by swamps, which somewhat narrowed the ground and prevented the Americans from utilizing fully their great superiority of numbers. The Americans were also formed in two lines.