The holy roman emperor (Henry IV) wanted to make the church independent from secular rulers so he banned the practice of Lay Investiture. The pope (Gregory VII) excommunicated him and went to find a new emperor when Henry IV confessed to him he was a sinner and Gregory forgave him. But Henry was so butt hurt about it that he sent to roman military to kill the pope. :)
These are our most sacred principles, our foundational civil rights of having status in this country. In the military we were drilled on them constantly, our rights hold us together. The Bill of Rights.