DuBois, Brendan. "The High-Water Mark"
Divergence: 1861 CE
What if: The Trent affair was not contained.
Summary: A century later a father tries to explain to his son why the (different) Battle of Gettysburg was so important and of the role their ancestor played in repelling the attack at the Angle in making it so.
Published: In Alternate Gettysburgs (eds. Brian M. Thomsen and Martin H. Greenberg), q.v.