Almost a year into the American Civil War, Union forces laid siege to Fort Donelson. In this episode, we're going to find out why this fort was strategically important, and how Ulysses S Grant got his nickname - Unconditional Surrender.

Don is joined by Chris Mackowski, Copie Hill Fellow at the American Battlefield Trust and professor at the Jandoli School of Communication at St Bonaventure University.

Produced by Sophie Gee. Edited by Aidan Lonergan. Senior Producer was Charlotte Long.

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