Great Crystal War

The Great Crystal War is a war waged between Equestria and the Crystal Empire in an alternate timeline created by Starlight Glimmer. It is featured in the season five episodeThe Cutie Re-Mark - Part 1 and Enterplay's collectible card game.

In When the Cold Breeze Blows Away, it would be mentioned in during pre-World War III when Equestria and Crystal Empire have their own history.

In post-Last Day of Equestria, the Great P365 War would be happened when Equestria and New Group P365 became fight each other.