Battle of Hoth (OOM's timeline)

The Battle of Hoth was the last stand of the Galactic Empire, and as expected was a failure for the Empire, leading to its dissolution and the eventual rise of the First Order.

Imperial fragmentation
The Empire was divided after Imperial Chancellor Thrawn was killed in a weapons test when a ship hyperspace rammed into the weapon, causing it to be destroyed.

Grand General Veers and Grand Admiral Pellaeon both agreed to help reunite the Empire, and succeeded in doing so. Many Imperial forces were recalled to Hoth, to prepare for a last stand, as the New Republic was moving its way across Imperial territory, and would not allow the Empire to concentrate their forces and strike back.

The plan
The Imperial plan was to build Cardan-class space stations throughout the entire Hoth system, and rebuild most of the Imperial Navy, and to launch a massive counter-attack to push the New Republic back. It would also be here that Jango Fett clones would be bred to serve the Galactic Empire, and grow within 2 years instead of the previous 5. However, New Republic intelligence caught wind of this plan, and would not allow this.

New Republic strike
The New Republic began the slow process of dismantling the Imperial fleet in orbit of Hoth, as well as taking out the Cardan-class space stations.