The humans of Sera are no strangers to war. Humans have been fighting for as long as they can remember. War is all they knew. Having fought for 15 years against the Locust Horde. But when they get cornered by the Horde, they activate a new bomb to take themselves and their enemies with them. But they don't die. They only get teleported to the world of Equestria.

Now, the soldiers of the COG and the ponies of Equestria must join forces and fight the invading Locust Horde. And, while they may have lost Sera, they promise not to lose this world to the Locust. This time they will fight and win.

(Story takes place during GoW 2 time line.)