There was a brief period of reunion and revival under George V the Brilliant (1299–1302, 1314–1346). With the support of Chupan, ulus-beg of the Ilkhanate, George eliminated his domestic opponents who remained independent of the Georgian crown. George V conquered Imereti, uniting all of the Georgian Kingdom before the death of the last effective Ilkhan Abu Sai'd. In 1319 George and the Mongols suppressed the rebellion of the Ilkhanid governor of Georgia, Qurumshi. Presumably due to the internal strife between the Mongol khanates and ilkhanid generals, almost all Mongol troops in Georgia withdrew in 1320s. The Ilkhan Abu Sai'd (d.1335) exempted Ani and the neighbouring districts of Georgia from any kind of taxes. In a 1321 letter, Bishop of Avignon mentions schismatic people (Georgians) who are a part of the Tatar Empire (Ilkhanate).