Battle of the Bretz System

The Battle of the Bretz System was a joint-Imperial castigation campaign carried by both the Gray Hussars Space Marine Chapter and their allies from the Dark Angels when they fought to defend the Bretz System against an unrecorded Chaos Warband.

Background
The Gray Hussars 1st Division Fleet translated in the Bretz System skimming the Maelstrom where the Dark Angels' fleet led by the Strike Cruiser, Pride of Caliban, was waiting. The Gray Hussars and Dark Angels consolidated above the world of Bretz Prime, Lor-Knight Ruuns and Grand Master of Ravenwing, Grand Master Gideon, discussed the return of the Fallen, in the year long voyage the Gray Hussars had extracted a lengthy detail of the Fallen and Grand Master Gideon feared that their lips would be opened. Upon the bridge of the Pride of Caliban, Lord-Knight Ruuns made a blood oath on the Gray Hussars honor that the honor of the Dark Angels would be upheld, and that the two chapters would be in alliance.

After the exchange, Lord-Knight Ruuns returned to Gray Hussars fleet when they detected the presence of Chaos ships entering system, lead by a World Eaters Chaos warband, the Reapers of Blood, were about to lead a raid against the system which had no defenses against a Chaos warband. The Gray Hussar stood their ground, planning an ambush in the asteroid belt between the Gas Giants of Bretz 5-9 and the Rock world of Bretz Prime, 1, and 3-5. The Ravenwing diverted the Chaos warband towards them that would take them past the asteroid belt, the Khornate berserkers falling for the trap. Assaulting the Dark Angels ship the Gray Hussars enveloped their fleet from the rear. Destroying an unspecified Chaos Battleship from an unknown period and sending the rest into attempted suicide ramming before being cut down, one-by-one.