I suspect that this might not be entirely historically accurate

On the bloody fields of Pennsylvania in 1863, two great armies collided to decide the fate of a nation. The South rose, and the North responded with fervent mettle.

As every schoolchild knows, at the forefront of the battle stood the mighty Yetis, white-furred giants imported from the wilds of Canada to shred the opposing front lines. From the rear, powerful mastodons hurled boulders into the fray. From even further to the rear, great generals engineered the destruction of the opposing forces—and quite often their own.