7 events the sources record for this year, grouped by region.
What happened
China (3)
Japanese ships invade the public boats of Jeju Island (Annals of the Joseon Dynasty 世宗實錄 二十五年 · 世宗實錄 32책 100권 28장 A면 · 기사 wda_12506010_005)
Hamgil-do jeoljesa Han Seo-ryong defeats the raiders Geoeulgagaeja and others (Annals of the Joseon Dynasty 世宗實錄 二十五年 · 世宗實錄 32책 101권 46장 A면 · 기사 wda_12509023_001)
Tsushima chechalsa Yi Ye returns with captured Japanese raiders (Annals of the Joseon Dynasty 世宗實錄 二十五年 · 世宗實錄 33책 102권 17장 A면 · 기사 wda_12511001_001)
Korean Peninsula (2)
One Japanese warship is captured (Annals of the Joseon Dynasty 世宗實錄 二十五年 · 世宗實錄 32책 100권 39장 A면 · 기사 wda_12506027_001)
Tongsinsa Byeon Hyo-mun returns and reports by express on his affairs in Japan (Annals of the Joseon Dynasty 世宗實錄 二十五年 · 世宗實錄 33책 102권 6장 B면 · 기사 wda_12510013_002)
West Asia (2)
Demetrios leads an army and besieges Constantinople. (Sphrantzes, Chronicle Bonn p.194)
Despot Constantine leaves Constantinople for the Peloponnese. (Sphrantzes, Chronicle Bonn p.196)