Gregory IX and Frederick came to a truce, but when Frederick defeated the Lombard League in 1239, the possibility that he might dominate all of Italy, surrounding the Papal States, became a very real threat. A new outbreak of hostilities led to a fresh excommunication of the emperor in 1239 and to a prolonged war. Gregory denounced Frederick II as a heretic and summoned a council at Rome to give point to his anathema. Frederick responded by trying to capture or sink as many ships carrying prelates to the synod as he could. Eberhard II von Truchsees, Prince-Archbishop of Salzburg, in 1241 at the Council of Regensburg declared that Gregory IX was "that man of perdition, whom they call Antichrist, who in his extravagant boasting says, 'I am God, I cannot err'." He argued that the Pope was the "little horn" of Daniel 7:8: