Upon reaching the city of Rey, Chormaqan made his winter camp there and dispatched his armies to pacify the rest of northern Persia. In 1231, he led his army southward and quickly captured the cities of Qum and Hamadan. From there, he sent armies into the regions of Fars and Kirman, whose rulers quickly submitted, preferring to pay tribute to Mongol overlords rather than having their states ravaged. Meanwhile, further east, Dayir steadily achieved his goals in capturing Kabul, Ghazni, and Zawulistan. With the Mongols already in control of Persia, Jalal al-Din was isolated in Transcaucasia where he was banished. Thus all of Persia was added to the Mongol Empire.