At four in the morning on April 19, 1775, a line of British soldiers stared across the village green of Lexington, Massachusetts, at a crowd of seventy-seven American militiamen. A shot rang out, and the Redcoats replied with a devastating volley. But the day that started so well for the king's troops would end in catastrophe: seventy-three British soldiers dead, two hundred wounded, and the survivors chased back into Boston by the angry...