During the American Revolutionary War, General George Washington's Continental Army retreated to Valley Forge, Pennsylvania, for the winter of 1777-1778. The soldiers faced catastrophic conditions: severe shortages of food, clothing, and shoes left many barefoot in the snow, while rampant typhus, typhoid, and dysentery devastated the ranks, killing over 2,000 men. Despite the lack of proper shelter and near-famine conditions, the army displayed incredible collective endurance, utilizing the time to undergo rigorous Prussian-style military drilling under Baron von Steuben, emerging in the spring as a highly disciplined, professionally transformed fighting force.

Valley Forge quickly evolved into an essential secular myth of American resilience and democratic sacrifice, widely celebrated in early American patriotic poetry and drama. Nineteenth-century poets like James Russell Lowell used the bitter winter landscape of Valley Forge as a powerful metaphor for spiritual testing, ideological purity, and the idea that enduring profound physical suffering is an essential prerequisite for achieving political and personal freedom.