In the 900s Arabs influence diminished in Caucasia significantly. In 1008 Kingdom of Georgia was formed. It was the major country in the region until the Mongols invaded in 1223. Georgia was part of the Mongolian empire for a century on and off until 1334, when King Giorgi V took over. In the 1400s Georgia dissolved into several principalities. In the 1500s the Persians invaded Eastern Georgia four times from 1541-1544. In 1555 the Kings of Kartli ruled through the will of the Persian Shahs.