For the next twenty years the two republics remained at peace with each other. Genoa succeeded in throwing off the Milanese yoke in 1356, with the result that the factions resumed their quarrels. Venice became involved in a war with Lewis the Great of Hungary (1356-8), in which Dalmatia was lost and Treviso was only retained with difficulty. This was followed by a revolt in Crete which was put down (1364), and by almost continuous quarrels with Francesco Carrara of Padua. These events forced the Venetians to maintain a policy of peace in the east. Even the war of 1373 in Cyprus, which subjected that island to the suzerainty of Genoa, failed to provoke more than a verbal protest from Venice. But events in the Eastern Empire at last drove the two republics to resume hostilities. John Palæologus had promised to Venice the rocky island of Tenedos, which commanded the entrance to the Hellespont. The Genoese, regarding this as threatening their security in Pera, organised a palace revolution in Constantinople, and seated Andronicus on the throne in place of his father. In return for this aid the usurper ceded Tenedos to his allies. But the governor of the island refused to recognise the authority of Andronicus, and handed his charge over to the Venetians. This was the immediate occasion for war. Vettor Pisani, in 1378, defeated the Genoese fleet off Cape Antium, and cleared the Adriatic of [Sidenote: War of Chioggia, 1378-81.] the pirates who plundered Venetian commerce. The winter he spent in the harbour of Pola, and was still there when he was confronted by Luciano Doria in command of another Genoese force (May 7, 1379). In the battle which followed Pisani was completely defeated, and was sentenced by the indignant Venetians to six months’ imprisonment and exclusion from any command for five years. Pietro Doria, the successor of Luciano who had been killed in the engagement, led the victorious fleet to the lagoons of Venice. The town of Chioggia, which commanded one of the main entrances from the open sea, was taken after an obstinate defence, and the way was opened to Venice itself. A prompt attack would probably have been successful, but Doria preferred the slower and surer method of a blockade. In this he reckoned upon the aid of Francesco Carrara, who eagerly welcomed the opportunity of humbling the formidable republic, and undertook to prevent the transit of supplies from the mainland. Never had the Venetians been in such a strait, but the courage of the citizens rose to meet the danger. Every vessel in Venetian waters was equipped and manned, and Vettor Pisani, the idol of the sailors, was released from prison to assume the chief command. Messengers were sent eastwards to recall Carlo Zeno, who had been despatched to the Levant at the beginning of the war with the second Venetian fleet. Meanwhile Pisani undertook the defence of Venice, and gradually drove the Genoese back to their stronghold of Chioggia.