The conceptual confrontation of two antithetical approaches to the biblical tidings escalated into a military conflict in late 1419 and early 1420. The spiritual sword yielded to the physical sword. It is significant that the banner with a cross did not find its counterpart in a banner with a chalice among the artistic symbols of the Catholic party, but in one with a goose. Perhaps it was also because the chalice was no less a sacred sign for the Catholics than for the Czech Utraquists that the illuminators of the party sub una let the Hussites fight under a banner with the picture of the goose.