 Pope Gelasius' bull was an unpleasant shock for Genoa, who coveted the island of Corsica, and a war broke out in 1119 between the two naval powers.The Genoese sent out a fleet of 28 galleys, but in a battle at Porto Venere the Pisans were victorious, as they were at a second battle at the mouth of the Arno River.The war lasted a total of fourteen years.