http://www.ushistory.org/us/11f.asp

American spirits reached a low point during the harsh winter of 1777-78.

British troops had marched triumphantly into Philadelphia the previous autumn. Philadelphia was the largest city in the Colonies and the seat of political power. After the British swept into Philadelphia, the Continental Congress had flee to west, first to Lancaster then to York.

Washington's army had spent the summer of 1777 fighting a string of losing battles. The Americans harassed the British army in skirmishes and minor battles for much of the fighting season. In the fall, the Americans showed pluck at the Battle of Brandywine in September and the Battle of Germantown in October. Yet the Americans were unable to keep the British out of Philadelphia.

In December, Washington marched his tired, beaten, hungry and sick army to Valley Forge, a location about 20 miles northwest of British-occupied Philadelphia. From Valley Forge, Washington could keep an eye on General Howe's British army ensconced in Philadelphia.

At Valley Forge, there were shortages of everything from food to clothing to medicine. Washington's men were sick from disease, hunger, and exposure. The Continental Army camped in crude log cabins and endured cold conditions while the Redcoats warmed themselves in colonial homes. The patriots went hungry while the British soldiers ate well.

Terms of enlistment were ending for many soldiers in Washington's army. The General wondered if he would even have an army left when the spring thaw finally arrived.