A thick fog clouded the battlefield throughout the day, greatly hampering coordination. The vanguard of Sullivan's column, upon Germantown Road, opened fire upon the British pickets on Mount Airy, just after sunrise at 05:00. The British pickets fired their cannon in alarm, and resisted the American advance. Howe rode forward, thinking they were being attacked by foraging or skirmishing parties, and ordered his men to hold their ground. It took a substantial part of Sullivan's division to finally overwhelm the British pickets, and drive them back into Germantown. Howe, still believing his men were facing only light opposition, called out; "For shame, Light Infantry! I never saw you retreat before! Form! Form! It is only a scouting party!" Just then, three American guns came into action, opening fire with
grapeshot. Howe and his staff quickly withdrew out of range. Several British officers were shocked to see their own soldiers rapidly falling back before the enemy attack. One British officer later described the number of attacking Americans as "overwhelming". Cut off from the main force, Lieutenant Colonel
Thomas Musgrave, of the British 40th Regiment of Foot, ordered his six companies of troops, around 120 men, to barricade and fortify the stone house of Pennsylvania Chief Justice
Benjamin Chew, called
Cliveden. The American troops launched a determined assault against Cliveden; however, the outnumbered defenders repulsed their attempts, inflicting heavy casualties. Washington called a council of war to decide how to deal with the fortification. Some of his subordinates favoured bypassing Cliveden entirely, leaving a regiment behind to besiege it. However, Washington's artillery commander, Brigadier General
Henry Knox, advised it was unwise to allow a fortified garrison to remain under enemy control in the rear of a forward advance. Washington concurred. General William Maxwell's brigade, which had been held in reserve, was brought forward to storm Cliveden, partially led by a volunteer aide from General Washington's own staff, Lieutenant Colonel
John Laurens, who had been shot through his right and dominant shoulder earlier in the battle; he had continued to fight with his aide riband wrapped around his arm and his sword in his left and non-dominant hand. Knox positioned four 3-pound cannon out of musket range to bombard the mansion. However, the thick walls of Cliveden withstood the bombardment from the light field guns. The Americans launched a second wave of infantry assaults, all of which were repulsed with heavy losses. The few Americans who managed to get inside the mansion were shot or bayoneted. It was becoming clear to the Americans that Cliveden was not going to be taken easily. Among this assault was Lieutenant
John Marshall of the Virginia Line, the future
Chief Justice of the United States, who was wounded during the attack. Before completely disregarding the notion of taking Cliveden, Laurens was offered the idea of burning or smoking the British out of the house. He took the idea and, according Gregory Massey's biography, he sent men to gather firewood to pile at the door. Once enough had gathered, Laurens and Marshall began to command the attack of charging to the front steps, dropping the firewood, and in groups, rushing to set fire to the wood. Laurens himself was sent forward with a torch with his companion, Major John White. The fire did not catch. While on the front steps of Cliveden, however, Laurens was under a barrage of gunfire and supposedly wounded a second time by a bayonet in his left side. Major White was shot and later pronounced dead. Both men were forced from the door and the
Chevalier de Mauduit convinced Laurens to cease his fighting before he later was moved to have a surgeon see to his wounds. Prior to Maxwell's futile attack against Cliveden, Sullivan's division advanced beyond in the fog. Sullivan deployed Brigadier General
Thomas Conway's brigade to the right, and Brigadier General
Anthony Wayne's brigade to the left before advancing on the British center-left. The 1st and 2nd Maryland Brigades of Sullivan's column paused frequently to fire volleys into the fog. While the tactic was effective in suppressing enemy opposition, his troops rapidly ran low on ammunition. Wayne's brigade to the left of the road moved ahead, and became precariously separated from Sullivan's main line. As the Americans launched their attack on Cliveden, Wayne's brigade heard the disquieting racket from Knox's artillery pieces to their rear. To their right, the firing from Sullivan's men died down as the Marylanders ran low on ammunition. Wayne's men began to panic in their apparent isolation, and so he ordered them to fall back. Sullivan was subsequently forced back, although the regiments fought a stubborn rear-guard action. Since the British units pursuing them were redirected to fight Greene's column, Sullivan's men fell back in good order. Meanwhile, Nathanael Greene's column on Limekiln Road had finally caught up with the bulk of the Americans at Germantown. Greene's vanguard engaged the British pickets at Luken's Mill, driving them back after a savage skirmish. The fog that clung to the field was compounded by palls of smoke from the cannon and musket fire, throwing Greene's column into disarray and confusion. One of Greene's brigades, under Brigadier General
Adam Stephen, veered off-course and began following Meetinghouse Road, instead of rendezvousing at Market Square with the rest of Greene's troops. The wayward brigade collided with Wayne's brigade, and mistook them for redcoats. The two American brigades
opened fire on each other in the fog, causing both to flee. The withdrawal of Wayne's New Jersey Brigade, having suffered heavy losses attacking Cliveden, left Conway's right flank exposed. To the north, an American column led by McDougall came under attack by the Loyalist troops of the Queen's Rangers, and the Guards of the British reserve. After a brutal contest, McDougall's brigade was forced to retreat, having suffered heavy losses. Despite the reversal in fortune, the Continentals were still convinced of a possible victory. The 9th Virginia Regiment of Greene's column launched a determined attack on the British lines as planned, managing to break through and capturing a number of prisoners. However, they were soon surrounded by two arriving British brigades under Cornwallis. Cornwallis then launched a counter-charge, cutting off the Virginians completely, forcing them to surrender. Greene, upon learning of the main army's defeat and withdrawal, realized he stood alone against Howe's entire army, and so withdrew. The primary attacks on the British and Hessian camp had all been repulsed with heavy casualties. Washington ordered Armstrong and Smallwood's men to withdraw. Maxwell's brigade, still having failed to capture Cliveden, was forced to fall back. Howe ordered a pursuit, harrying the retreating Americans for some , though he did not follow up on his victory. The pursuing British forces were finally forced to retire in the face of resistance from Greene's infantry, Wayne's artillery, and a detachment of dragoons, as well as the coming of the night. On October 6, there was a brief cease-fire. A little terrier that was identified from its collar as belonging to General Howe was formally transferred from Washington's camp to Howe's under a flag of truce. The little terrier that had been found wandering on the battlefield was brought to Washington, who had the dog fed, cleaned and brushed before being returned to Howe. ==Casualties==