A short explanation regarding the 'Timestamp' feature. The first entry is an indication of how certain the date is (on a 0-9 scale). The lower the number, the more certain the date is. For example a '0' means the event took place on Terra, while a '9'… more »

The Horus Heresy (M31) The second most important event in human history is Warmaster Horus' (the Emperor's second in command during the Great Crusade) betrayal of the Emperor. Although Horus would eventually be defeated, the cost to the Imperium was g… more »

Earth's (known only as Terra in the 41st Millennium) early history has largely been lost, leaving little but legends and myths. All Imperial citizens know that the human race originated on Holy Terra, but beyond that they know nothing, save of course tha… more »

816.M41 First Assassination of Lord Sector Hax: Death Cult Assassins of the Astral Knives strike at Lord Sector Hax, stabbing him a total of one hundred and fifteen times before they are killed by security forces. Lord Hax survives and undergoes extensiv… more »

CALIXIS TIMELINEDATE STAMP 40K STANDARD / DARK HERESYM30-M31 THE GREAT CRUSADEEARLY M31 THE HORUS HERESYM31-M32 THE AGE OF REBIRTH: The Imperium rises from the ashes of the Horus heresy under the direction of the High Lords of Terra.M32-M34… more »

I've just noticed that the 'official' start date for DH is 815.M41, a bit earlier than the 999.M41 we've been looking at thus far. Not that it really matters that much - actually I tend to prefer to not stick too close to established conventions. So we'r… more »