In Poland slavery was forbidden in the 15th century; it was replaced by the second enserfment. In Lithuania, slavery was formally abolished in 1588.

What was the last country to abolish slavery?

The last country to abolish slavery was Mauritania (1981).

When did the Slavs end?

The settling of the Slavs on Balkan Peninsula began in the 6th century with Slavs' raids into Byzantium and ended with permanent colonisation of the large number of Slavs in the Balkans (among which the Serb tribes) in the first half of the 7th century.