The situation of the Americans was now more precarious than it had been at Fort Lee. They were in danger of being shut in between the Hackensack and Passaic rivers; they were in a perfectly flat country, without intrenching tools or camp equipage; their right flank could be turned and their line of retreat threatened if the British should land a force at the head of Newark Bay or at Amboy. Washington's forces were greatly reduced by reverses and by desertions. Nearly all that were left were militia of the flying camp, called out for an emergency, and impatient to return home, as their time of service had nearly expired. Small as his numbers were, Washington was obliged to post some at Amboy and others at Brunswick, to protect his flanks. As those remaining were insufficient to hinder the advance of the enemy in his front, he ordered Lee, whom he had left in command on the east of the Hudson, to cross that river and join him, and, with hardly three thousand men, Washington began his retreat through the Jerseys. On the 21st he was at Aquacknoc Bridge on the Passaic, and by the 23d at Newark. On the 28th he left Newark, the advance-guard of the British entering the town as his rear-guard quitted it, and the next day he arrived at Brunswick. Here an attempt would have been made to prevent the enemy crossing the Raritan, but the stream was fordable in a number of places. As the British approached, the Jersey and Maryland brigades, whose terms of service expired that day, refused to stay an hour longer, and as the British crossed the river the line of march was again taken up for Trenton. This point was reached on the 2d of December, two brigades having been left at Princeton, under Stirling, to watch the enemy. Having seen his stores and baggage safely over the Delaware, and being reinforced by about twelve hundred militia from the neighborhood of Philadelphia, Washington faced about on the 6th, with such men as were fit for service, and set out to join Stirling at Princeton.