Nuclear Weapon

Despite their age, Nuclear Weapons (or atomics^[13]) are still used by the Imperium.

Known Nuclear Weapons Platforms

The Deathstrike Missile Launcher, though the Imperial Guard prefers Plasma warheads^[12].
Imperial Navy warships may use atomics during Exterminatus and orbital bombardment^[13]
Harbinger Bomber^[5]

The ancient civil wars which devastated Baal^[3]
Mass use during the Unification Wars^[10]
Corvus Corax and his rebels unleashed a nuclear bombardment of Kiavahr during their slave revolt.^[6]
The Sarosh attempted to assassinate Lion El'Jonson with a nuclear warhead during the Great Crusade^[1]
The Fall of the Lords of Gardinaal - Used by Gardinaal forces^[7]
Unleashed by traitor forces against loyalists during the Battle of Isstvan III^[13]
The Drop Site Massacre - The Iron Warriors launched a tactical nuclear weapon at Vulkan's position.^[4]
During the Schism of Mars hundreds of nuclear weapons silos were fired against loyalist forces^[11].
The Krieg Civil War^[2]
Chaos Space Marine forces unleashed nuclear weapons against the world of Ioline during the Diamor Campaign^[8]
The Blood Angels fleet launched mass nuclear bombardment against Tyranid forces during the Devastation of Baal.^[9]