Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Valley Forge National Historical Park is the site where the Continental Army spent the winter of 1777 1778 near Valley Forge, Pennsylvania, during the American Revolutionary War. The National Historical Park preserves the site and interprets the history of the Valley Forge encampment. Originally Valley Forge State Park, it became a national park in 1976. The Park contains historical buildings, recreated encampment structures, memorials, museums, and recreation facilities. The park encompasses 3,500 acres (1,400 ha) and is visited by over 1.2 million people each year.