Complex sentence: During this war, Peroz suffered a heavy defeat during a third battle between the two forces in 469, and was captured by Hephthalites, but was released after he paid ransom, which the Byzantines aided him in by lending him some money.
Split into simpler sentences: During this war, Peroz suffered a heavy defeat in the third battle between the two forces in 469, and was captured by Hephthalites. He was released after paying ransom; the Byzantines aided him in by lending him some money.