Changes

The '''First Tyrannic War''' (745.M41): The Imperium makes first contact with the Tyranid race when [[Hive Fleet Behemoth]] invades the [[Eastern Fringe]] and annihilates planet [[Tyran]]; Behemoth is defeated, though at great cost, by the [[Ultramarines]] at the [[Battle for Macragge]].

*[[Fall of Tyran]]

==Second Tyrannic War==

The '''Second Tyrannic War''' (990-993.M41): Hive Fleet [[Kraken]] invades and is, again, narrowly defeated.

*[[Ichar IV Campaign]]