There had been previous interdicts laid on Venice. In 1202 the Venetian siege of Zadar during the Fourth Crusade led Pope Innocent III to excommunicate the army. In 1284, Pope Martin IV imposed an interdict because of Venice's refusal to support a crusade. Pope Clement V addressed escalating measures against Venice after the 1308 capture of Ferrara; and later in the War of Ferrara of the 1480s Pope Sixtus IV laid an interdict on Venice, an erstwhile ally. In 1509 Pope Julius II placed Venice under interdict, during the War of the League of Cambrai, to further the papal cause in warfare in the Romagna.