What was the Major battle in Pennsylvania called?

Two of the biggest battles of the war were in Pennsylvania. Brandywine, on September 11, 1777, was Washington's attempt to halt a British march on Philadelphia. The battle was along Brandywine Creek south of Philadelphia, at Chadd's Ford of the Creek, and is sometimes called Chadd's Ford. The patriots lost, and the British captured Philadelphia. The Patriots tried to recapture Philadelphia by attacking and fighting a battle at Germantown October 8, 1777, but lost again. The British holed up in a large home made of stone, belonging to the Chief Justice of the Pennsylvania Supreme Court, Benjamin Chew, known as the Chew House, which still stands in Germantown, and the Patriots were not able to drive them out. After these battles Washington's army went into winter quarters at Valley Forge, west of Philadelphia.