On May 10, 1775, in the storm-tossed hours after midnight, Ethan Allen, the Revolutionary firebrand, was poised for attack. With only two boatloads of his scraggly band of Vermont volunteers having made it across the wind-whipped waters of Lake Champlain, he was waiting for the rest of his Green Mountain boys to arrive. But with the protective darkness quickly fading, Allen determined that he hold off no longer. While Ethan Allen, a canonical hero...