7 events the sources record for this year, grouped by region.
What happened
China (1)
When the Prince of Han, Zhu Gaoxu, rebelled, the emperor took the field in person, reached Le'an and forced his surrender. (History of Ming (Mingshi), Annals 明史 卷9 宣德元年)
Southeast Asia (3)
Lü Qian approached Đông Quan citadel with 3,000 troops, but Ming troops came out and defeated him. (Đại Việt sử ký toàn thư 本紀卷之十 「丙午<sub>明宣宗瞻基宣德初年」)
Li An and Fang Zheng abandoned Nghệ An and returned to Đông Quan by sea. (Đại Việt sử ký toàn thư 本紀卷之十 「丙午<sub>明宣宗瞻基宣德初年」)
The emperor attacked Đông Đô citadel day and night; the Ming troops were defeated and lost heart. (Đại Việt sử ký toàn thư 本紀卷之十 「丙午<sub>明宣宗瞻基宣德初年」)
West Asia (2)
John shuns his Montferrat-born empress because of her looks, so she conspires with the Genoese of Galata, escapes by ship to Italy and lives as a nun at her family home. (Doukas, History 20 (Bonn p.100-102))
Empress Sophia leaves her husband John VIII and returns to her homeland (Montferrat). (Sphrantzes, Chronicle Lib.I 말미 (줄 3952–3956))
Eastern Europe & Russia (1)
Vitovt besieges Boronachi for three weeks and withdraws. (Novgorod First Chronicle litopys 기사 1426년)