In the 13th Black Crusade, Abaddon the Despoiler, greatest champion of Chaos since the infamous Warmaster Horus, launched a massive offensive against Cadia itself. The offensive would culminate in the destruction of the planet by order of the Chaos general and the creation of the Great Rift that would split the Imperium into two.
The Fall of Cadia was the Forces of Chaos’s greatest victory…but even as the Forces of Chaos cheered, word spread of the Cadian Shock Troops’ last stand. In the days that followed, Imperial forces would retaliate against the Forces of Chaos, shouting a single phrase in defiance and hatred:
“Cadia broke before the Guard!”