The Hungarian conquest started in the context of a late or 'small' migration of peoples. Contemporary sources attest that the Hungarians crossed the Carpathian Mountains following a joint attack in 894 or 895 by the Pechenegs and Bulgarians against them. They first took control over the lowlands east of the river Danube and attacked and occupied Pannonia (the region to the west of the river) in 900. They exploited internal conflicts in Moravia and annihilated this state sometime between 902 and 906.