Blood on the Water
All during the later later part of the Civil War the Great Lakes states were under continuous secret attack by the Confederacy.
Intrigue, conspiracy and plotting were thick and furious as the South desperately tried to attack the "soft underbelly" of the Union - the Great Lakes!
From scheming to springing full blown insurrections in Chicago, attacking port cities with armed steamers, destroying vital locks and waterways and breaking Confederate prisoners out of Union confinement, rebel agents were pulling out all the stops in a last ditch effort to save the South.
Blood on the Water is a fascinating look at what could have happened if Confederate plans weren't foiled by Union agents or collapsing through Southern ineptitude.