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Appearing openly for the first time, The Emperor led his [[Thunder Warriors]], genetically engineered super soldiers created in secret laboratories{{Fn|6}}, in a series of campaigns against all other warlords and [[Techno-barbarian]]s of Old Earth. His forces included not only the Thunder Warriors but also the [[Custodian Guard]], formations that would become the early [[Imperial Army]] including [[Geno Five-Two Chiliad]] and the [[Inferallti Hussars]], and eventually the proto-[[Astartes]]. His forces utilized the advanced weapons of the [[Terrawatt Clan]] after he secured an alliance with them.{{Fn|8}} Thus did the Emperor make his move on the major powers of Terra.{{Fn|8}} One of his earliest major campaigns was against the [[Maulland Sen Confederacy]].{{Fn|1919a}}

*[[Albia]] - Albians refused to kneel before the Emperor and met his Thunder Warriors with their own proto-dreadnoughts and armored ironside soldiers. In battle after battle, the Albians managed to hold back the Emperor's forces but only at staggering cost for the defenders. Admitting the martial temper and indomitable spirit of his foe, the Emperor called a ceasefire and sought a diplomatic solution. The Emperor appeared before the Albian Clan Lords unarmed and clothed in white and crimson, speaking of his vision of a unified mankind. He offered them glory among the stars and redemption. To the shock of many, the warlords of Albia, seeing the Emperor as different from past tyrants, accepted terms and soon became one of the most zealous supporters of unification.{{Fn|1010b}}

The final battle One of the war last battles in [[Europa (Terra)|Europa]] was the [[Battle of Gaduare|Massacre at Gaduare]] in [[Franc]], where 5,000 Imperial Thunder Warriors slaughtered 50,000 rebel militia.{{Fn|5}} In 669.[[M30]], the last act major battle of the Unification era saw the Emperor purge most of the Thunder Warriors at Mount Ararat, making way for his next generation of superhuman warriors, the [[Space Marines]].{{Fn|9}}{{Fn|21}} After his military victories At some point after the purge of Mount Ararat, the Emperor sought to spread his [[Imperial TruthPalace Coup]] across the planetwas launched by dissident Imperials, including surviving Thunder Warriors, enforcing atheism and destroying who had come to oppose the planet's churchesEmperor for various regions. The final church uprising was crushed with the first mass use of Space Marines.{{Fn|19b}} From then on, Space Marines became a prominent part in the Imperial armies on Terra, the and began developing their distinct, [[Church of the Lightning StoneSpace Marine Legion|Legion]]-specific characteristics. For example, was destroyed shortly before the [[Great CrusadeWhite Scars]].{{Fn|5}} The Unification Wars were officially declared over in 712.used by the [[M30Emperor]]as an outriders probing enemy strongholds for weakness and striking where opportunity arose.{{Fn|2117}}

It is also known that during Among the last period final anti-Imperial warlords to brought low was [[Cardinal Tang]] who still resisted Imperial rule by 703.[[M30]],{{Fn|10a}}{{Fn|21}} when most of Terra had already submitted to the Unification WarsImperium. In that year, the Emperor then set his sights on [[Space MarinesLuna]] already were presented , [[First Pacification of Luna|occupying it in a quick campaign]].{{Fn|14}}{{Fn|21}} After his military victories the Emperor sought to spread his [[Imperial Truth]] across the planet, enforcing atheism and took part in some decisive campaignsdestroying the planet's churches. For exampleThe final church of Terra, the [[Church of the Lightning Stone]], was destroyed shortly before the [[White ScarsGreat Crusade]] .{{Fn|5}} The Unification Wars were used by the officially declared over in 712.[[EmperorM30]] as an outriders probing enemy strongholds for weakness and striking where opportunity arose.{{Fn|1721}}

After securing victory on capturing Terra, the Emperor then set his sights on [[Luna]], [[First Pacification of Luna|occupying it in a quick campaign]].{{Fn|14}} After capturing and Luna and winning the allegiance of the [[Mechanicum]] of [[Mars]], the Emperor launched his [[Great Crusade]]. Over the next 200 years, the Emperor spearheaded the Astartes Legions in reconquering much of the Galaxy and finding the lost [[Primarch]]s.{{Fn|7b}}

*{{Endn|10}}: [[The Horus Heresy Book One - Betrayal]], **{{Endn|10a}}: pg. 80**{{Endn|10b}}: pg. 121

*{{Endn|19}}: [[Valdor: Birth of the Imperium (Novel)]] **{{Endn|19a}}: Chapter 5**{{Endn|19b}}: Chapter 12