Warhammer Horus Heresy — the greatest civil war in the history of the Imperium, fought in 30,000 AD. Shop Legiones Astartes, Mechanicum, Solar Auxilia, starter sets, and rulebooks at Loaded Dice, Barry, South Wales.
Getting into the Horus Heresy
Set ten thousand years before Warhammer 40,000, the Horus Heresy tells how the Emperor's favourite son turned traitor and split the Space Marine Legions in two. On the tabletop that means Legion against Legion: the same armour marks, the same tanks, very different loyalties. It's a game of big, characterful armies, and a dream for painters who love heraldry.
Where to start
Many Heresy-era kits also suit Space Marine and Chaos armies in 40k: see 40k Space Marines and 40k Chaos. Want the story first? Start with Horus Rising, book one of the Black Library series.