The conquest of Dacia saw a similar process of Romanisation north of the Danube, so that by AD 200, Latin was probably predominant in the zone permanently occupied by the Romans. In addition, it appears that some unoccupied parts of the dava zone were overrun, either before or during the Dacian Wars, by Sarmatian tribes; for example, eastern Wallachia, which had fallen under the Roxolani by AD 68. By around 200 AD, it is likely that the Dacian language was confined to those parts of the dava zone occupied by the Free Dacian groups, which may have amounted to little more than the eastern Carpathians.