Battle of Arconar
The Battle of Arconar took place in 861.M41 on the Feral World of Arconar where Marneus Calgar and the Ultramarines fought against a coalition of Eldar raiders. The Ultramarines attacked with such force that they managed to scatter the Eldar and capture their bases both on and off of the planet.
- 1: Codex: Space Marines (3rd Edition), pg. 36
- 2: Imperial Armour Volume Two - Second Edition: War Machines of the Adeptus Astartes, pg. 21