Defence of Rikkai
From Warhammer 40k - Lexicanum
The Defence of Rikkai began when Renegade Space Marines assaulted the Agri-World of Rikkai.[1]
Faced with this formidable foe, the Valhallan 171st engaged in a fighting retreat, withdrawing to the inhospitable regions at the planet's southern pole. From this location, they fought a months-long campaign of attrition against the renegades. Two-thirds of the Valhallans were killed, but this brought enough time for the Dark Angels to arrive and relieve the world.[1]
Sources
- 1: Codex: Astra Militarum (10th Edition), pg. 35