History shows that leadership is crucial in war, but there are other factors at work. What if history were given a twist or two, and great commanders on land and sea fought their greatest battles under different circumstances? Suppose General Douglas MacArthur had been captured before he could escape from Manila and became a prisoner of war? Suppose Joan of Arc had not been burned for heresy and had gone on to lead France to very different victories? Suppose Genghis Khan had been a convert to Judaism and his horde fought for a different cause than in our universe? Turtledove and his colleagues¿Esther M. Friesner, Judith Tarr, Mike Resnick, Brad Linaweaver, Roland J. Green, and more¿turn the past upside down and inside out, and the possibilities are endless. . . .