Changes

Early warning signs of the apocalyptic threat of Hive Fleet Behemoth came from an [[Explorator]] census of the planetary systems [[System]]s on the Eastern Fringe surrounding [[Tyran]] undertaken in the preceding decade before Behemoth's invasion. Planets known to have been full of life were discovered reduced to lifeless, barren rock without even any living bacteria. These mysterious new [[Dead World]]s were reported to the [[Explorator General]] but nothing came of it. The outpost on Tyran also filed its own reports of discovered dead worlds, but no help was sent.^1b

Hive Fleet Behemoth attacked from the galactic south-east of the Eastern Fringe without warning and ploughed wildly into the galaxy, ruining hundreds of [[Systems]] systems and devouring everything in its path. Compared to later Hive Fleets which adopted different strategies, Behemoth showed no subtlety in its berserker advance. Eventually its onslaught used more biomass than it could replace and it all but consumed itself in the process of breaking the Imperial defence at the Battle for Macragge.^1a