 Complete the following phrase:  Meanwhile, in 632 the Bulgars formed an independent state north of the Black sea that became known as Great Bulgaria under the leadership of Kubrat. Pressure from the Khazars led to the disintegration of Great Bulgaria in the second half of the 7th century. One of Kubrats successors, Asparukh, migrated with some of the Bulgar tribes to the area around the Danube delta, and subsequently conquered Scythia Minor and Moesia Inferior from the Byzantine Empire, expanding his new kingdom further into the Balkan peninsula. The crucial 