I work at another HQ of Washington's in the Hudson Valley. From my experiences, I have found that the letters of Washington hold information about his various locations throughout the war. I would visit the Library of Congress website (loc.gov) and review his letters from 1777 to find out where he was.
The battle of Philadelphia began on the night of September 25, 1777. The British captured Philadelphia the following day and occupied the city until June 18, 1778.
Camp Valley Forge is where General Washington stayed the winter of 1777-1778, and ended up suffering many hardships.
1777
In 1777, the British' attempt to cut New England off from the rest of the colonies failed when Burgoyne surrendered his army at Saratoga.
It was after the second of the two Battles of Saratoga that General Burgoyne of Great Britain surrendered his men. This occurred on October 7, 1777.
William Howe
September 1777
After defeating General Washington at the Battle of Brandywine on Sept. 11, 1777, General Howe captured and occupied the city of Philadelphia on Sept. 26, 1777.
Old Valley
Philadelphia
No, Washington's army did not spend the winter of 1777-1778 in Philadelphia. Instead, they spent that harsh winter at Valley Forge, Pennsylvania, about 18 miles northwest of Philadelphia. The troops faced extreme conditions, including cold weather and food shortages, but the time spent there was crucial for training and regrouping, ultimately strengthening the Continental Army.
Vally Forge
British General Sir William Howe.
Philadelphia campaign happened in 1777.
One of the most famous volunteers to serve under George Washington was the Marquis de Lafayette. Born in 1757, he joined the Revolution in 1777 commissioned as a Major General by the US Congress.
1777???
yes they did win the battle