Rynn's World - WAAAGH! Snagrod: In 989.M41 WAAAGH! Snagrod fell upon Rynn's World, bringing with it a devistation unparalleled by any other Ork invasion since those for the Hive World of Armageddon. While the Imperium's ground forces struggled to defend the planet's cities, the Imperial Navy fought for the skies in an air war that spanned months of bitter conflict and countless warzones.When the neighbouring system of Badlanding fell to WAAAGH! Snagrod, the Crimson Fists swiftly prepared for invasion, their Strike Cruisers joining with the Rynn's World system fleet, their Battle Companies mustering for war and their Thunderhawk gunship squadrons taking to the skies.By contrast the Planetary Defence Forces of Rynn's World mobilised slowly, many of the upper echelons of Rynnite society refusing to believe WAAAGH! Snagrod would reach them, and even if it did that the might of the Crimson Fists and their extensive orbital and surface-to-space defence network would be enough to throw the xenos back into the void.When it came, the Greenskin invasion was shockingly fast and utterly devastating, far swifter than even the Space Marines could have anticipated. A vast Ork armada swept away the planet's orbital defences and warships in a matter of solar hours, with a single damaged Crimson Fists craft escaping into the Warp to summon aid.On the ground things were even worse. The Arx Tyrannus, along with the greater measure of the Chapter's strength, was obliterated by a catastrophically misfired orbital defence plasma missile. The errant missile scored an impressively accurate, if altogether unintentional, hit on the Fortress-Monastery's main Armoury.The arsenal, the fortress-monastery of the Crimson Fists, the mountain, and an area half a mile wide were instantly atomized. The Chapter was almost obliterated in the ensuing holocaust.In less than a solar day the planet was brought to the brink of annihilation, its fate resting in the hands of a small number of surviving Space Marines and the vastly outnumbered Rynnite Planetary Defence Force.Only 16 Crimson Fists garrisoned in the fortress-monastery survived, including Chapter Master Pedro Kantor and Captain Alessio Cortez. The surviving Crimson Fists stayed in New Rynn City and held out against the Orkish siege of the city.Reeling from the destruction of the Arx Tyrannus, the people of Rynn's World looked upwards in shock as the skies darkened with Ork landing craft. Planetary Governor Lady Maia Cagliestra, surrounded by panicked generals and nobles, desperately tried to contact the surviving Space Marines, or establish if Pedro Kantor still lived, but to no avail.With the system fleet broken, the Greenskins began a full-scale planetary landing. Ground-to-orbit defences concentrated their efforts on protecting the planet's single spaceport and nearby New Rynn City.Macro cannon arrays, turbo-laser towers and missile batteries turned the sky crimson with their fury as they vainly tried to stem the flow of xenos landing craft, but it was like throwing pebbles onto a collapsing dam.One by one the defensive guns were silenced and all that remained between Imperial soil and Ork boots were scattered squadrons of the Rynnsguard Airwing.The valiant Rynnsguard Airwing fought a constant tide of Ork air assaults. With support from the Crimson Fists' surviving Thunderhawk gunship squadrons, it fell to the Airwing to defend the skies over New Rynn City, attack the Ork landing zones, and protect the vital shipping lanes between the planet’s scattered islands.It was to be a long and gruelling campaign filled with countless daring sorties by aces on both sides, and one that raged on even after Imperium reinforcements reached the beleaguered world.The Siege of New Rynn City was to grind on for eighteen solar months, but the Crimson Fists were able to maintain their defences until an Imperial Navy liberation fleet, including elements from 6 other Space Marine Chapters, finally arrived in 990.M41, 18 solar months after the invasion began. The Imperial reinforcements drove the Orks from the world.