A-KU-TA AND THE FOUNDING OF THE CHIN DYNASTY 225
Liao state, with Yen (Peking) as its center. The Sung, on the other hand,
thought that they could make their own territorial claims acceptable to the
Chin only by offering a military alliance. Soon the Chin also put forward
their claim that they should be regarded as the legitimate successors of Liao
with regard to the annual Sung "tribute" payments.
By the time a formal treaty was finally concluded in 1123 - the first one
between the two states
—
the military situation had radically changed. Sung
attempts to capture Yen had failed, whereas the Chin armies had not only
forced the Western and the Central capitals of Liao to surrender but, by the
end of 1122, had also been able to conquer Yen, its Southern Capital. The
Liao emperor had already become a fugitive in the far west; the end of his
empire was in sight. With Yen in the possession of the Chin, A-ku-ta's
position had become unassailable, and the Sung were forced on the defensive.
They had to accept A-ku-ta's conditions concerning the return of the Yen
region to the Sung. Not all of the six prefectures of the Yen region were to be
handed back to Sung, and in addition to the annual payments formerly
granted to the Liao, the Sung had to pay the Chin a huge compensation for
the loss of tax income from the Yen prefectures.
One might ask why A-ku-ta consented at all to conclude a formal treaty
with Sung, as his military position was so strong. A possible answer is that
he wanted to formalize the question of annual payments. These amounted to
200,000 taels of silver.and 300,000 bolts of silk, a sum perhaps not ruinous
to Sung China's treasuries but important as a source of income for A-ku-ta's
own young state of Chin. The treaty was, in addition, a way to have his own
imperial status solemnly recognized. The treaty text, as was usual in Chinese
diplomacy since early times, was couched in the form of two parallel and
identical oath-letters, and no differentiation in status between the parties is
implied in the texts of the respective documents. A-ku-ta is addressed as
"August Emperor of the great Chin," and the Sung ruler accordingly. This
meant that Chin had now achieved a state of equality with Sung, only ten
years after the formal foundation of the Chin as a dynasty.
These oath-letters were exchanged during the third and the fourth month
of 1123. Their texts do not, however, contain any details about how the
cession of the six prefectures to Sung should be carried out. Other details,
such as delimiting the borders, were also left to be worked out in corollary
agreements. The general instability of the situation, together with the points
left undecided, became the reason that instead of leading to a stabilization of
China's northern border, the treaty of 1123 marked the beginning of a long
period
—
lasting for almost twenty years
—
of violent and devastating warfare
that more than once threatened the very existence of Sung China.
By the time A-ku-ta concluded his alliance with Sung, the Liao state had
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