This document provides a summary of key events from 1777 during the Revolutionary War, including General Washington's victory at Princeton in January, the winter encampment at Morristown from January to May, the arrival of the Marquis de Lafayette and Baron von Steuben to aid the Continental Army, several battles including Brandywine and Saratoga where the British were defeated, and the winter at Valley Forge from December 1777 to June 1778 where the Continental Army struggled but was trained by von Steuben.