Ultima Convoy Incident

The Ultima Convoy Incident, is a notorious incident that occurred in the Aramar System in 620.M41, supposedly involving the the Shadow Warriors Chapter and a lost Imperial convoy, which resulted in the loss of several heavy artillery pieces that mysteriously ended up on one of the world's that were watched over by the Chapter. Though it has never been fully explained, rumours of the Chapter's involvement in the disappearance of these weapons has never been fully corroborated.

History
In M41.620, a strange event occurred that brought the Shadow Warriors into an Imperial debate that would last decades, the causes still remaining unresolved to this day. An Imperial Navy convoy transferring fifty-two heavy artillery pieces with over a billion shells amongst various other Imperial weapons was scheduled to reach the Eastern Fringe after a series of jumps from Forge World Ryza to assist in the Tau conflict. In an unfortunate turn of events part of the convoy had blown off course in warp translation, emerging from warp space thousands of light years to the galactic north-east.

They emerged at Aramar; a heavily disputed system on the fringes of the Shadow Warrior's patrols and a pirate hotspot. With warp systems fried on various ships and only sub-light engines intact the remaining convoy made to dock at Aramar Central, a massive naval dock orbiting the anarchic hive world of Aramar Prime. Word soon spread throughout the sector of the stranded Navy Convoy, reaching not only the ears of the Shadow Warriors but the countless pirates and raiders in the region. The inevitable pirate raids began; the offer of heavy Imperial ordnance too much to pass up, defended by a handful of support vessels the convoy would be easy pickings.

Strangely enough the Shadow Warriors delayed their assistance, although it was known at the time that they greatly opposed the distribution of Imperial ordnance to the Eastern Fringe; seeing it as a waste as they deemed fledgling Tau race as no threat to the Imperium. Only after the Imperial convoy had been decimated did the Shadow Warriors make their move; unusually striking out past their patrol borders, the marines assailed the pirates, destroying them all and returning their loot to the Imperium. When the ordnance reached the Eastern Fringe, however, much of the cargo was missing.

The Shadow Warriors explained that much of the cargo was destroyed in the battle with the pirates. A short-lived Imperial Investigation was initiated only to find nothing. Three decades later it was observed that many weapons sharing the serial number of the missing artillery pieces had showed up on Maphelat IV, an Imperial world known to be under the watch of the Shadow Warriors. This has never been investigated further however, the case being long closed and too distant from the Imperial core to merit any attention.