Not that the inhabitants of this world hadn't had the occasional war themselves. Erin's reading of Equestrian history had uncovered several. The griffons and minotaurs were seemingly always at each other's throats, and occasionally either of those races came after Equestria. Ponies had the occasional border skirmishes with both of those races, as well as the occasional marauding dragon, Diamond Dog raids, altercations with the zebra tribes, these things happened on a fairly regular basis. There had even been a minor skirmish with the otherwise very friendly buffalo over a small pony settlement that just happened to be located on buffalo territory, though that one ended with no bloodshed. 