Conflicts in 1838

war between France and Mexico

part of the Great Trek, fought on the bank of the Ncome river in South Africa in 1838

war in South America between 1836 and 1839

1835–1842 war in Florida

1830's UK-US war

The Cabanagem (; 1835–1840) was a popular revolution and pro-separatist movement that occurred in the then province of Grão-Pará, Empire of Brazil.

1838 massacre of Voortrekkers by Zulu

The Sabinada (1837–1838) was a revolt by military officer Francisco Sabino that occurred in Brazil's Bahia province between 6 November 1837 and 16 March 1838. The rebels proposed the existence of a Bahian Republic of a transitory nature until Emperor Dom Pedro II reached the age of majority. Calling for the abolition of slavery and the redistribution of land, they fought against the government for one year until their capital of Salvador was conquered.

US punitive expedition against Sumatra, after Malay warriors or pirates killed the crew of the US merchant ship Eclipse

The Cincomarzada was a failed Carlist attempt to conquer the city of Zaragoza on 5 March 1838. Nowadays it is a popular holiday in Zaragoza commemorating the heroic behaviour of the citizens during the First Carlist War.

1837 action by Qajar Persia that preceded the Anglo-Persian War

1838 naval battle

Kurdish uprising led by Muhammad Pasha of Rawanduz against the Ottoman Empire in 1830–1838, aiming to expand his autonomy and assert control over neighboring territories

1838 battle between Voortrekkers and Zulus

1838 battle