Births on July 27

Thomas George Bonney, English geologist, mountaineer, and academic (d. 1923)

Thomas George Bonney (27 July 1833 – 10 December 1923) was an English geologist, president of the Geological Society of London.

13 Jan

Nullification Crisis
United States President Andrew Jackson writes to Vice President Martin Van Buren expressing his opposition to South Carolina's defiance of federal authority in the Nullification Crisis.
10 May

Lê Văn Khôi revolt
The desecration of the grave of the viceroy of southern Vietnam Lê Văn Duyệt by Emperor Minh Mạng provokes his adopted son to start a revolt.
5 Jul

Lê Văn Khôi revolt
Lê Văn Khôi along with 27 soldiers stage a mutiny taking over the Phiên An citadel, developing into the Lê Văn Khôi revolt against Emperor Minh Mạng.
11 Jul

Yagan
Noongar Australian aboriginal warrior Yagan, wanted for the murder of white colonists in Western Australia, is killed.
18 Dec

God Save the Tsar!
The national anthem of the Russian Empire, "God Save the Tsar!", is first performed.