Hive Fleet Dagon - Current Status: Imperial forces have continued to analyse Hive Fleet Dagon, but any measurement based upon Tyranid activity is confounded by the Shadow in the Warp. As the xenos presence prevents Imperial forces from effective communication, it is likely that additional worlds have fallen to the alien threat without the Achilus Crusade or even the Deathwatch becoming aware of the attacks. Consequently, any analysis that depends upon such data collection must be carefully considered in light of this imposed limitation.Though Herisor was the first world to fall to the Tyranid threat, attacks upon Freya and Zanatov's Harbour also occurred in short order. Timing of these early attacks is difficult to gauge, as there was little contact during the attack and substantial time may have passed before investigations revealed the Tyranid activity. Best estimates suggest that all three of these worlds were under assault at the same time. Since these initial attacks, reports have begun pouring in from worlds all across the rimward edge of the Jericho Reach.Much of this information comes from bedraggled survivors who managed to escape on Warp-capable vessels just as their worlds were being consumed, and crusade leadership has struggled to sort through the mountains of contradictory reports. Some headway has been made in stalling the relentless advance of the hive fleet, but most of it has been due to the efforts of the command Triumvirate of the Orpheus Salient who are operating deep within the Shadow in the Warp.The agents of the Deathwatch and the Ordo Xenos have had much more luck than the overwhelmed crusade leadership. Making use of their array of rapid strike vessels, the Deathwatch has sent kill-teams into the swarm to collect genetic samples for analysis, scout the hive fleet's progress into the system, and to strike at high-value targets when the opportunity arises.However, even the elite and well-organised Deathwatch Space Marines have difficulty contending with the complete communications blackout imposed by the Shadow in the Warp. Watch Fortress Erioch will go great lengths of time hearing nothing from the rimward edge of the Reach, unsure if the watch stations there are even still standing.Based upon the time stamps of various incident reports, Hive Fleet Dagon has no fewer than three sub-fleets. Reports of historical Tyranid strategies suggest that a Hive Ship rarely leaves a star system prior to completing the assimilation and destruction of all planets within that system.As there are large-scale attacks currently in progress on no fewer than nine star systems in the Jericho Reach, crusade tacticians, including the Lord Militant Solomon Tetrarchus, have been unable to reconcile this broad battlefront with the notion of a limited engagement by a Tyranid splinter fleet. Each of these sub-fleets requires a separate Hive Ship to coordinate its Hive Mind. In order to ultimately defeat the Tyranid attack, each subfleet must be eliminated, so that the Hive Mind throughout the Reach may be compromised.Until that happens, surviving Hive Ships could travel to a contested system, throwing their added might into a battle. Coordinating the battle plan to simultaneously defeat all of these bio-ships may be impossible while dealing with the limitations of astrotelepathic communication in the presence of the Shadow in the Warp.