Mis-communication has started many a war, but in this case maybe calling it a war was too generous.

The "war" is over, Twilight has successfully orchestrated a bloodless end to the Griffons' aggression, but only now does she realize that there is more to winning than she had first assumed, especially against a nation that holds war as a central part of their culture...

Now Twilight must deal with the aftermath while facing a challenge she never anticipated: being seen as a conqueror.

This can be read alone, but I recommend reading the letter that started it all for a chuckle and a little exposition. This series of expositional one-shots can also give some additional world-building.

Equestria is threatened by a deadly alliance of Gryphons, Minotaurs, Horses and Changelings, an alliance that was supposedly created to maintain peace in Equestria. But Celestia is no fool. She knows that a war is coming, a war that cannot be stopped, and without allies and guards with no combat experience, Equestria won't stand a chance.

In the several corners of the world, humans are either enslaved to be gladiators, servants or guards. Those who remain free, struggle to survive. And with the other races of the world approaching more and more in human territory, their future seems grim and their numbers grow fewer.