on their way back home, the hungarians accomplished a military performance, which was never even tried by a land army in the history. having no ships, boats or any kind of water crafts, on 29 june 900, they "embarked" on a sea campaign against venice. as "chronicon sagornini" of john the deacon writes that with their horses and "leather ships" to attack first the cities from the coast, then also the city of venice itself. the "leather ship" here refer to an animal skin (goat, sheep, maybe cow) tied up to form something like a huge bota bag, filled with air, tied on their horses sides, which helped the warrior and his horse to float, with which the hungarians and the warriors of other nomadic societies usually used to cross rivers. they first attacked and burned the coastal towns like equilio, cittanova, fine, capo d'argine, then tying the filled animal skins to their horses, they crossed the waters of the lagoon of venice, and sacked the island town of chioggia, which was a part of the dogado (homeland of the republic of venice). then on the day of the martyrdom of saint peter and saint paul (29 june), on their "leather ships", they tried to enter rialto and malamocco, but before they reached the islands, on the place called albiola the doge of venice pietro tribuno met them with the venetian war fleet, forcing them to retreat. although they lost this unusual sea battle, the hungarians achieved something what was never done by a land army: attacking islands lying in the sea. and although the attack from 29 june was unsuccessful, they succeeded in the attack on the island of chioggia. this attack was not a violation of the agreement with berengar, because at that time venice was not part of the italian kingdom, but was an autonomous republic under byzantine influence.