Marines Errant

The Marines Errant is a Loyalist, fleet-based Space Marine Chapter credited in the Mythos Angelica Mortis as a successor of the Eagle Warriors Chapter, giving it Ultramarines lineage. It was created late during the 23rd Founding in the 37th Millennium, to repair the gap left in Imperial military forces by the loss of other Chapters. The Chapter was well-named, for over the millennia since their Founding, the Chapter’s Battle-Brothers have been active throughout the entirety of the Imperium and often far beyond its borders.