|Marine||Basic Data||Chapter Symbol|
The Sky Sentinels were sent to reclaim the Agri World Sondheim V from Hive Fleet Leviathan and the forces of the Daemon Prince M'kar the Reborn. Upon seeing the turmoil of the situation planetside, however, the chapter opted to launch Exterminatus against the planet instead.
In the aftermath of the Great Rift's creation, during the Thirteenth Black Crusade, the Chapter's Homeworld was invaded by Chaos forces led by the Daemon Primarch Magnus. Every Sky Sentinel came to Pranagar's defense during the invasion, but it was not enough and the entire Chapter was destroyed, before Magnus' forces overran their Homeworld.
- 1: Codex: Space Marines (5th Edition), pg. 30
- 2: Codex: Tyranids (5th Edition), pg. 28
- 3: Warhammer 40,000 8th Edition Rulebook, pgs. 151 - Dark Imperium