 These were deployed by the Church in the Christian conflicts with Muslims during in the 11thcentury in the Iberian Peninsula and in campaign against the Emirate of Sicily Gregory VII went further in 1074, planning a display of military power to reinforce the principle of papal sovereignty in a holy war supporting Byzantium against the Seljuks, but was unable to build support for this.Theologian Anselm of Lucca took the decisive step towards an authentic crusader ideology, stating that fighting for legitimate purposes could result in the remission of sins.On the Iberian Peninsula there was no significant Christian polity.