Claws Strike at Midnight

The Claws Strike at Midnight was the name of an Imperial campaign conducted by the darkly famed Midnight Claws Space Marine Chapter, whose mastery at stealth and the lightning assault, was well-suited for conducting space-lane duties to protect vital Adeptus Mechanicus transports carrying precious technology. The Chapter played an instrumental role in ensuring the safety of the Mechanicus vessels, stopping several waves of Ork corsair vessels before they could pose any real danger to the Chapter's charges.

History
During this time, the Midnight Claws' 4th, 7th and 9th Companies were tasked with securing Mechanicus ship convoys from possible Ork raids. The companies would encounter several waves of orks that would destroy several ships whose cargo has been saved. What wasn't known by the chapter was that a Warboss was about to start a WAAAGH! against several systems next to their homeworld, endangering it.