From Warhammer 40k - Lexicanum
Kaligar is a Fallen Angel and a key insurgent leader of the Fourth Quadrant Rebellion. During the battle against the Dark Angels, his fortress was besieged and engaged by Sammael, Master of the Ravenwing. Dueling for a full day and night, Kaligar was eventually defeated by the Dark Angel.
- 1: Codex: Dark Angels (4th Edition), pg. 44