forming 21 banners. The remnants of Tsogtu Khong Taiji's Halhs form only one banner and are known as the "Lower Mongols" or "ДООД МОНГОЛ". Tsogtu Khong Taiji is known as Tsogtu Khan among the Khalkha Mongols in Qinghai. The Khalkha Right Wing Banner: This banner was popularly known as the Darkhan Beili Banner and the ruler of this banner was the descendant of Gersenz Jalair Khan's grandson Bunidari. In 1653 they migrated into Inner Mongolia from the Tusheet Khan Aimak of Outer Mongolia. The Khalkha East Wing Banner: This banner was popularly known as the "Chokhor Halh" and the ruler of this banner was the descendant of Gombo-Ilden, the fifth generation grandson to Gersenz Jalair Khan. They fled from the Zasakto Khan Aimak of Outer Mongolia to Inner Mongolia in 1664. Its boundaries as given by the Mongol Pastures run 125 by 230 "li", or about . The Tanggot Khalkha Banner: This Banner formerly subordinated for administrative purposes to the East Wing Tumet (Monggoljin) Banner, is popularly known as Tanggot Khalkha. This tiny territory, of not more than , is said to have a population of about 500 people. There are practically no Chinese, as the surrounding districts are held by Mongols. The tribe, which has a prince of its own, was founded by immigrants from the Jasakto Khan division of Outer Mongolia, who fled to Inner Mongolia and offered submission to the Manchus in 1662, during the wars between the Northern (Khalkha) and Western (Ulot) Mongols. Loss of Khalkha territory to Imperial Russia and the Buriatized Khalkhas During the rise of Genghis Khan in the 12th to 13th centuries, neither the Selenge valley in today's southern Buriatia or the Aga steppe had at this time any connection with the Buriats; these were the lands of the Merkid tribe and the Mongol tribe proper. Starting 1628 with the Russian Conquest and Buriat Migration, the Selenge Valley, as before, was inhabited by Mongol clans under the rule of the Khalkha khans. By 1652 the Khalkha khans were protesting the Russian incursions into Transbaikalia, and from 1666 on Khalkha raiding parties reached as far as Bratsk, Ilimsk, Yeravninsk, and Nerchinsk, while the khans besieged the forts on the Selenge. At the same time, however, the Khoris along the Uda River in 1647 surrendered as a block to the Russians to escape paying tribute to the Khalkhas. Smaller Mongol clan fragments also defected