The two Rus raids on the Caspian had created a very strong impression on the Muslim world. Ibn Miskawayh thought them formidable fighters, ‘they do not recognise defeats,’ he said, ‘no one turns back until he has killed or been killed.’ Another writer, Marwazi, praised their courage, saying that one Rus ‘is equal to a number of any other nation’. He was grateful that the Rus fought on foot, ‘if they had horses and were riders, they would be a great scourge to mankind’.