358 THE RISE OF THE MONGOLIAN EMPIRE
Mukhali returned to the south in the same year and set up military-
administrative headquarters at Chung-tu (now renamed Yen) and Hsi-ching
(modern Ta-t'ung). The forces at his disposal included 23,000 troops of the
left wing of the Mongolian army, augmented by 77,000 Chinese, Jurchen,
and Khitan auxiliaries that had either surrendered or defected to the Mongols
during the earlier fighting with the Chin. As a matter of policy the Mongols
encouraged and rewarded such defections, and the results had been gratify-
ing: Many Chin commanders, especially those of non-Jurchen origin, came
over with their units intact. It was the addition of these crucial auxiliaries,
which comprised three quarters of the troops available to Mukhali, that
enabled the Mongols to maintain unremitting pressure on the Chin even after
the greater part of their army, the center and right wing, had been with-
drawn from north China and committed in the west.
1
''*
In the initial phase of the new campaign, the Mongols launched a three-
pronged attack from Chung-tu and Hsi-ching designed to wrest Shansi,
Hopei, and Shantung from Chin control. Pushing into Hopei with the center
and main column, Mukhali soon encountered stiff
resistance.
Cities had to be
taken by direct assault, at high cost to both sides. On several occasions cities
won at such a high price were lost and had to be retaken. Though the going
was difficult, Mukhali was nonetheless making slow progress. In 1218,
leaving the Chin defector Chang Jou behind to consolidate Mongolian gains
in Hopei, Mukhali shifted his attention to Shansi.
T'ai-yiian, the main Chin bastion in the northwest of the province, was
taken in October, and the Mongols were then able to drive steadily to the
south. By the end of 1219 only the southernmost strip of Shansi remained
outside Mongolian control. Mukhali now returned to central Hopei and
received the surrender of
the
remaining Chin-controlled cities, including the
key garrison at Ta-ming, during the summer and fall of 1220. Thereafter he
pressed on into western Shantung, taking its chief city, Chi-nan, in October,
without a fight.
The relatively easy campaigning of 1220 was made possible by the Chin
dynasty's ill-advised military involvement in the south. In 1217, during the
lull in the fighting with the Mongols, the Chin emperor had foolishly
consented to open a campaign against the Sung, which had suspended its
tribute payments to the Jurchen court three years earlier. The series of annual
44 The number of troops available to Mukhali was carefully calculated by Huang Shih-chien in "Mu-hua-li
kuo wang hui hsia chu chiin k'ao," Yuan shih lun ts'ung, i (1982), pp.
57—71.
For accounts of the
campaign, see Igor de Rachewiltz, "Muqali, Bol, Tas and An-t'ung,"
Papers on
Far
Eastern
History, 15
(1977),
pp. 45—55; and Martin, The rise ofChingis khan, pp. 239—82. On the role of the Sung in the
Mongolian—Jurchen conflict of 1217—25, see Charles A. Peterson, "Old illusions and new realities:
Sung foreign policy, 1217—1234," in China
among
equals: The Middle
Kingdom
and its
neighbors,
10th-
14th
centuries,
ed. Morris Rossabi (Berkeley and Los Angeles, 1983), pp. 204-20.
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