Battle of Qadisiyyah was more devastating for the Persians than the Battle of Yarmouk was for the Romans Their defeat at Qadisiyyah left the Persian capital exposed to Muslim forces However, the Roman capital was hundreds of miles away in Constantinople and very safe from Muslim forces The Romans still had the ability to wage war against the Muslims However, the Persians were now just trying to survive We'll look at the events in Syria after Yarmouk first, and then take a look at Persia after Qadisiyyah