In this scenario, I was thinking of how Earth would react (militarily) to the emerges of the Locust Horde?. An alternate version of said planet where Equestria appeared in the South Pacific Ocean 5 years prior to "Emergence Day". How would Equestria react to the threat of the Locust Horde? Will Earth and Equestria unite to combat this new threat? Or will both Humanity and Ponykind face extinction.

P.S: Feel free to add your own ideas of what weapons will humanity and ponykind would use to kill Locust. Gears of War 1, 2, and 3 and GOW: Judgement weapons are welcome if you don't have any weapon ideas.

P.S.S: This alternate version of Earth is slightly different from ours because it has no knowledge of My Little Pony and Gears of War. But history remains the same as our planet's.