<b>THANKSGIVING FACTOID:</b> Although the first Thanksgiving was celebrated in 1621 by the Pilgrims who survived their first winter at Plymouth, the holiday has some military connections. During the Revolutionary War in October 1777, all of the 13 states joined in the first United States Thanksgiving celebration. America's first president and commander in chief, George Washington, proclaimed the first official day of Thanksgiving in 1789. Abraham Lincoln revived the tradition during the Civil War. And as the threat of global war loomed in 1941, Thanksgiving was finally sanctioned by Congress as a legal holiday. Pictured here is President Truman, pardoning the Thanksgiving turkey. Truman was president during parts of both World War II and the Korean War.