thousand ounces of gold and acknowledging himself a Chinese vassal. The
Sanpou also agreed to accept Chinese education, and as his reward Taitsong
gave him one of his daughters as a wife. It is stated that one of his
first reforms was to abolish the national practice of painting the face,
and he also built a walled city to proclaim his glory as the son-in-law of
the Emperor of China. During Taitsong's life there was no further trouble
on the side of Tibet.

Taitsong was not so fortunate in his relations with Corea, where a
stubborn people and an inaccessible country imposed a bar to his ambition.
Attempts had been made at earlier periods to bring Corea under the
influence of the Chinese ruler, and to treat it as a tributary state. A
certain measure of success had occasionaly attended these attempts, but on
the whole Corea had preserved its independence. When Taitsong in the
plenitude of his power called upon the King of Corea to pay tribute, and
to return to his subordinate position, he received a defiant reply, and
the Coreans began to encroach on Sinlo, a small state which threw itself
on the protection of China. The name of Corea at this time was Kaoli, and
the supreme direction of affairs at this period was held by a noble named
Chuen Gaisoowun, who had murdered his own sovereign. Taitsong, irritated
by his defiance, sent a large army to the frontier, and when Gaisoowun,
alarmed by the storm he had raised, made a humble submission and sent the
proper tribute, the emperor gave expression to his displeasure and
disapproval of the regicide's acts by rejecting his gifts and announcing
his resolve to prosecute the war. It is never prudent to drive an opponent
to desperation, and Gaisoowun, who might have been a good neighbor if
Taitsong had accepted his offer, proved a bitter and determined
antagonist. The first campaign was marked by the expected success of the
Chinese army. The Coreans were defeated in several battles, several
important towns were captured, but Taitsong had to admit that these