Howe could not ascend the Delaware to Philadelphia because it was defended by Forts Mifflin and Mercer. He prepared to attack them.
A large force of British were at Germantown, and on the night of Oct. 2, Washington performed a march of fifteen miles and attacked them. A quick and signal victory perched upon his banners, and the enemy fled in confusion. The victory was turned into defeat, however, by a serious blunder. The British had been driven three miles, leaving tents and baggage behind, and were still on the retreat when in the dense fog, several Jersey and Maryland regiments approaching, were mistaken for British reinforcements. The cry was raised: "We are surrounded and retreat cut off!" whereupon the Americans retreated in confusion.
General Sullivan wrote of Washington in that battle:
"I saw, with great concern, our brave commander-in-chief exposing himself to the hottest fire of the enemy, in such a manner that regard for my country obliged me to ride to him and beg him to retire. He, to gratify me and others, withdrew a short distance; but his anxiety for the fate of the day soon brought him up again, where he remained till our troops had retreated."
At great sacrifice of men and money, the British removed the obstructions from the river, and took possession of Philadelphia.
Dr. Franklin was in Paris when the news reached him, "Howe has taken Philadelphia." "No," replied Franklin, "Philadelphia has taken Howe."
The sequel proved that Franklin had an eye upon the future.
Although the prospect was gloomy in Pennsylvania, glad tidings came to Washington from the north. The Americans completely surrounded Burgoyne's army at Saratoga, so that farther retreat was impossible. On the 16th of October, 1777, after holding a council of war, Burgoyne surrendered to General Gates, remarking:
"The fortune of war has made me your prisoner."