Some of you might know the story of how Equestria fell to the caribou.

But what if Equestria along with the Griffons, Zebras, and other races were allied with humans (either Sci-fi or fantasy). what would happen?

For Sci-fi humans (Terran Republic, Imperium of man, UNSC, United Federation of Planets, and the list goes on):
-They would evacuate civilians off the planet.
-Conduct slave camp liberation raids.
-Bomb caribou fortifications from orbit.
-Considering how humans treat the caribou in a war crime trial. If humans were on the level of the Imperium, they would definitely exterminate them. But if they're on the level of the Federation, they would exile them to a planet and keep them under martial law (District 9 kind)

For Fantasy humans (The Empire of Tamriel, The Empire from Warhammer fantasy, Gondor, Ferelden, and the list goes on)
-Intervene when the caribou are invading
-Human sorcerers using an anti-magic spell to counter-act with the mind control spell
-An epic duel between a human protagonist and Dainn.

Both of them:
-Battles between humans and caribou
-Human heroes always gets the damsel

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Nope you didn't.

But yeah. Sci-fi humans would definitely win without any complications or setbacks. Fantasy on the other hand would be something more challenging.