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‘Goseibai Shikimoku’ was established in 1232. It established the legal law of the Kamakura shogunate in Japan.
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The first mongol invasion occured in 1274. In November, an armada of nearly 900 vessels containing more than 40,000 troops was dispatched from Korea.
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The second Mongol invasion happened in 1281. During the second invasion, the Mongol forces were driven back to their ships.
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Emperor Go-Daigo overthrew the Kamakura government in 1331. This caused sporadic fighting between his supporters and those of the shogunate, and in 1333 decisive events, marked by much treachery and violence, took place.
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In the year after the death of his father Yoshiakira in 1367, Yoshimitsu became Seii Taishogun at age 11. This resulted the Ōnin War in 1379.
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During this time, the old system of estates stopped and almost all of the Ashikaga lords lost their power.
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The Portuguese brought the Firearms to japan in 1543.
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It resulted in the fall of the Taira clan and the establishment of the Kamakura shogunate under Minamoto Yoritomo.