Two secret battlefield letters written by George Washington during one of the toughest winters of the Revolutionary War have recently surfaced and are now up for sale — just in time for America’s 250th birthday celebration this July 4.

More than a decade before he became the country's first president, George Washington was leading a critical campaign in the early days of the American Revolution. The Siege of Boston was his first campaign as commander-in-chief of the Continental Army and,

GW led by 10 after one quarter, but the advantage was down to one point in the third, before the top seed stepped up.