Sombart was an Imperial rear admiral who served under Reinhard von Lohengramm. In 799 UC, just prior to the Battle of Vermilion, he was charged with securing the supply line between the Imperial mainland and the military base being established on the planet Uruvasi. Despite his confident assurance that he would succeed in this mission, the supply vessels under his charge ultimately fell to an Alliance attack, and he was punished accordingly by Reinhard.