It always struck me as odd when I read history books as a kid: cannons are pretty much giant shotguns — why didn't they ever make double-barreled cannon pieces? Well, I wasn't the only genius with the idea.
A Southerner from Athens, Ga. named Pvt. John Gilleland forged one in 1862. Gilleland's idea was to connect the two three-inch barrels by firing chain shot connected by two six-pound balls. When fired, the designer's idea was for the balls to be shot at different angles to allow the ten-foot chain to fully extend.
If you're not sure what chain shot does to walking bags of meat (soldiers), the guys at MythBusters demonstrated this on a pig carcass – warning: it doesn't end well for the pig carcass.
This ends well for no one.
His tests showed erratic and often dangerous results. Though the gun was designed for both barrels to be fired simultaneously, they often didn't, meaning an intense veering in an unintended direction. When they did fire, the chain would sometimes break apart, with two end of chain led by a ball, each veering three degrees away from each other at more than a thousand feet per second.
Gilleland still declared it a success and sent it to be tested with the Confederate Army. The Confederates found the cannon "not usable due to unpredictable rates of powder burn and barrel friction which led to unpredictable performance."
So the Confederate government sent the cannon back to Gilleland in Athens. The weapons was still used in combat in just one battle. As Union raiders approached Athens on July 27, 1863, the double-barrel cannon was used as a signal gun to rouse the population to arms.
Some 9,000 Union cavalry approached Athens as part of General William T. Sherman's "March to the Sea." Athens would be put to the torch, but not if the Georgia Home Guard Artillery could repel them.
At Barber's Creek, just south of Athens, the cavalry hopped across the Confederate earthwork defenses. But before they could break the home guard completely, the city's cannon and howitzers stole the initiative and fired a volley into the oncoming traffic. The yankees broke off the attack and Athens was spared.
Today the cannon is parked on Hancock and College Avenues in Athens.
Pointed North, of course.