Editing San Angelus Incident

{{Infobox 40k Campaign
|title=San Angelus Incident
|image=[[File:San angelus logo.jpg|275px]]
|attacker=Thunder Warriors
|defender=[[Sacred Band]]
|commander1=Unknown
|commander2=Sergeant Mamercus
|date=c.775.M30
|scale=under-hive block
|theatre=San Angelus Hive, Merica
|strength1=approximately 30 Thunder Warriors
|strength2=[[Void Angels|Fifth Squad]], ten Space Marines
|casualties1=2 Thunder Warriors slain, 5 injured
|casualties2=wiped out
|status=Debacle
|outcome=Development of Fifth Legion set back, Thunder Warriors discredited 
}}

{{/tg/-Heresy-Battle}}

The '''San Angelus Incident''' was a small clash during the [[Unification Wars (Hektor Heresy)|Unification Wars]], but one that had a great impact on the development of the [[Legiones Astartes (Hektor Heresy)|Space Marine Legions]].

During the '''Pacification of the Merican Hives''', [[Hektor Cincinnatus]]' [[Sacred Band]] undertook many dangerous missions to speed the Imperial advance.  Early in the campaign, the Space Marines were called on to conduct a reconnaissance in force into the depths of the San Angelus Hive.  Sergeant Mamercus and his [[Void Angels|Fifth Squad]] became separated in the confused conditions of the underhive and lost contact with the rest of the Sacred Band.  [[Orend Ymoro]]'s [[War Scribes|Second Squad]] would eventually find the torn bodies of the slain Space Marines.  An investigation of the surviving vid-logs indicated that Mamercus and his men had not fallen victim to Merican partisans, but instead had been killed by out of control Thunder Warriors.

The loss of their command cadre greatly slowed the development of Fifth Legion.  [[Antoine Antonelle]], previously considered as a top candidate for Legion Quartermaster, was called on to guide the Fifth, but he commanded little respect among the veterans of the Sacred Band and the Legion was starved of resources for decades.  The incident may have also played a role in discrediting the Thunder Warriors, leading to their removal from the forces of the Emperor after the Battle of Mount Ararat.