Valley Forge National Park serves as a reminder of the sacrifices made during the Revolutionary War. The park's 3,600 acres contain rolling hills that provide an example of conservation efforts. During the winter of 1777, over 12,000 American soldiers arrived at Valley Forge to camp for the winter, facing shortages of food, clothing, and medical supplies that led to starvation, disease, and death for many troops. Today the park works to preserve the landscape and history while addressing issues like invasive plant species and overpopulation of deer.