The classification of Hutu or Tutsi was not merely based on ethnic criteria alone. Hutu farmers that managed to acquire wealth and livestock were regularly granted the higher social status of Tutsi, some even made it to become close advisors of the ''Ganwa''. On the other hand, there are also reports of Tutsi that lost all their cattle and subsequently lost their higher status and were called Hutu. Thus, the distinction between Hutu and Tutsi was also a socio-cultural concept, instead of a purely ethnic one. There were also many reports of marriages between Hutu and Tutsi people. In general, regional ties and power struggles played a far more determining role in Burundi's politics than ethnicity.