A faction from the early 21st century brings boatloads of AK-47 machine guns back to General Lee in the War between the States.
My friends and I—everyone who belongs to America Will Break—come from a hundred and fifty years in your future.

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Variants

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  1. The Guns of the South by Harry Turtledove (Ballantine Books, October 1992).
  2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . written by Harry Turtledove