CM - Tiberius Maximus [link]
Pegasus Assault Marines [link]
(Note this is a 1st made up chapter so the backstory isn't 100% perfect.)
*This chapter is based on a existing unknown deleted chapter created by GW
The Founding of the White Unicorns is unrecorded. The White Unicorns are almost entirely absent from Imperial records. The Chapter was first recorded in the works of the Administratum field notary Corwen Quilpin in the 3rd Century of the 40th Millennium. The Chapter was next referenced only a few decades later fighting alongside the Blood Angels. The White Unicorns are noted for bearing all manner of holy relics, and ancient patterns, of arms, armour and vehicles. They appear to have inherited the most revered arms and armour, preserving them, and bearing them down the through the ages against the foes of the Emperor of Mankind.