The Great Game

The Great Game was the name of the joint-Imperial xenocidal excoriation campaign carried out by the Star Wardens and Mordekaisers Space Marine Chapters against the Tyranid Splinter Fleet dubbed Hive Fleet Hydra.

Background
Once again the Star Wardens would be called upon to hunt down the Tyranid, and the chapter responded with relish. They were tasked with engaging a splinter of hive fleet Hydra that was already engaged with another minor hive fleet. Fighting alongside the Star Wardens was the Mordekaiser's chapter, also of Dorn's line and possessing a keen reputation at conducting void warfare. The Mordekaiser's offered something of a challenge as to who could reap a bloodier tally upon the Tyranid, and a bemused Star Wardens accepted the wager. Weeks later the sector was clear of all Tyranid presence, the competition was a clear tie, and a warm friendship and mutual respect had blossomed between the chapters. The lack of a clear winner fostered a continued sense of competitiveness between the chapters, thus marking a tradition known as the Great Game.