User blog comment:Vivaporius/AT Idea: Imperial Civil War/@comment-3341288-20120408193232/@comment-2253300-20120410182614

Just FYI, Sanguinius was the most beloved of the Primarchs. Temples dedicated to him tend to be built right next to those of the Emperor's. He even has his own holiday, Sanguinala, which from what I understand is almost the Imperial equivalent of Christmas.