This is a legendary era .. The galaxy is engulfed in flames. The Emperor's great design for humanity is destroyed. His beloved son Horus turned away from his father's light and accepted Chaos. His armies, powerful and formidable space paratroopers, are embroiled in a brutal civil war. Once these perfect warriors fought shoulder to shoulder as brothers, defending the galaxy and bringing humanity back to the light of the Emperor. Now they are divided.... Some of them remain loyal to the Emperor, while others have joined the Warrior. Among them are the commanders of thousands of Legions - primarchi .. Majestic superhuman beings, they are the crowning creation of the Emperor's genetic science The victory of any of the parties to the battle with each other is not obvious ..