sentences:  In 1475, concomitantly with the introduction of field guns, he ordered the installation of artillery onto the river barges as well as bombards able to shoot cannonballs ranging from In 1479, he had a mixed fleet of 360 vessels, a crew of 2600 sailors, and a capacity of 10,000 soldiers on board.Matthias also secured an exit to the Adriatic Sea, the city-port of Zengg from which Balázs Matthias could embark for his maritime campaigns.Matthias could also monitor the trade going through the Danube Delta to the Black Sea from the City of Kilia, but during his reign, it was seized by the Moldavian Army supported by the Ottoman Fleet.