The Siege of Nova Terra was the final epic battle of the nine centuries-long conflict known as the Nova Terra Interregnum between the Imperium of Man and the Secessionist pocket empire of Nova Terra. This was one of the bloodiest conflicts the galaxy had seen since the Siege of the Imperial Palace at the end of the Horus Heresy. After nearly nine long centuries of constant warfare, an uneasy stalemate was called, and the Imperium of Man reluctantly recognised the new empire. Today the Nova Terra Regency stands as a beacon of secular thought and reason in a galaxy otherwise bathed in ignorance and superstition.
After nine centuries of constant attrition warfare the Imperial forces finally pushed through to Nova Terra and commenced the battle with a devastating orbital bombardment that saw a vast majority of vital infrastructure of Nova Terra destroyed.