Slaves are plentiful in the Italian city-states…

Slaves are plentiful in the Italian city-states as late as the fifteenth century.

Between 1414 and 1423, some ten thousand slaves have been sold in Venice, almost all of whom were "nubile" young women from the Balkans.

The Ottoman Empire starts sea campaigns as early as 1423, when it initiates what will be a seven-year war with the Venetian Republic over maritime control of the Aegean, the Ionian, and the Adriatic Seas.