It is not well known that celebrated secessionist Edmund Ruffin was indeed, at the outbreak of the war, very close to the perfection of of his "Flux Capacitor", but the war led to a shortage of necessary materials and components.
From Wikipedia:
"In June, 1860 Edmund Ruffin published a futuristic novel,
Anticipations of the Future, to Serve as Lesson for the Present Time correctly predicting Abrahan Lincoln winning the election of 1860, followed by Republican William Seward in 1864. The potential reelection of Seward in 1868 brings secession, then a war that takes place in Virginia. The North enlists "Negro armies," and violence racks Northern cities before a truce leaves an independent South. At the end of the book Ruffin offers a second outcome. The South secedes immediately and "the great cities of Boston, New York and Philadelphia... (are) sacked and burnt, and their wealthiest inhabitants massacred, by their own destitute, vicious and desperate population..." "
These predictions were based on his early experiments with "time travel".
Unfortunately, lacking materials to complete his invention, Ruffin so immersed himself in his "time travel" experiments, that he ultimately drove himself insane, finally shooting himself at the close of the war.
That was the end of developement of the "Flux Capacitor" untill the year 1885, when a man uncannelly resemblng Ruffin, one Emmett L. Brown, in a town called Hill Valley, after reading Rufffins works, began to put together those pieces and materials unavailable to Ruffin.
Brown (reputably related to the John Brown(of moulderen in the grave fame), a staunch Unionist (what else in 1985?) did not employ his invention to intervene in that long past war.
see:
http://en.wikipedia.org/wiki/Edmund_Ruffin