It was the biggest battle of the American Revolution, but many Americans died, and it was a great loss for Washington.
Battle of Brandywine
The Patriots ambushed the Hessians (by crossing the Delaware), and gave the Continental Army morale to show that they could win.
Battle of Saratoga
The retreat got changed into a victory! Britain mostly left New Jersey afterward. Washington demonstrated his leadership.
SUMMARY
Another major loss, Philadelphia got captured. Washington failed to defend it. It was a very long and bloody battle that ended the Patriots winning streak.
Major win for the Patriots, and a big turning point, persuaded the Spanish, Dutch and French to join.
The Patriots kept on losing badly, but then the Battle of Trenton happened, and it boosted their morale. They were on a winning streak until the Battle of Brandywine were Philadelphia got captured by the British. Then the Battle of Saratoga was a major win, it was named the turning point of the American Revolution, because foreign countries joined the cause.