Alicornin, Draconequarp, and the Pony Tribelands. Each different countries, and continents. One eventually became known as Equesteria, and some Alicorns decided to butt in and rule it. Alicornin was ruled by Sir Concord, father of Princess Celestia and Princess Luna. Draconequarp was ruled by King Tumult, who's son, Discord, was banished for breaking the few laws the land had. Discord took over Equesteria, and, until the Alicorn princesses saved it with the "Elements of Harmony" they found there, which were formed from the harmony, friendship, and then the hardships found at that land, which made the land receive worthy calls of distress.
The two sisters banished Discord, accidentally bringing forth the day and night, for from the waning of the chaos, and waning of a great many millennium, it was practically predictable.
Now, Sir Concord is angry with some decisions his daughter made, and King Tumult is angry with what he recently learned happened to his son, who he wanted to bring back. After seeing their Declarations of War, Princess Celestia and Princess Luna agreed that they must take action.
How? A "Weapon of Mass Chaos and Harmony", also known as Discord. Now reformed and ready to listen, it is Discord who must harmonize the Draconequui and give a "little scare" to the Alicorns.

A/N and technical stuff:

A story with multiple perspectives. In first person the star is Discord, and in second person, you, a worker for a successful yet greedy chocolate company from Trottingham.

Crossover with Animaniacs, the Warner Siblings in particular, whom Discord brought to Equesteria when he was thinking of ways to wreak havoc.

I made this when I was watching an episode of Animaniacs, and I thought there should be a reason why Celestia wanted Discord to be reformed, and wanted to avoid a complete clop-fic.