Siamese-Vietnamese War (1831–34)
The Siamese–Vietnamese War of 1831–1834, also known as the Siamese-Cambodian War of 1831–1834, was sparked by a Siamese invasion force under General Bodindecha that was attempting to conquer Cambodia and southern Vietnam. Wikipedia
End date: 1834
Start date: 1831
Result: Vietnamese victory; Vietnam annexes eastern Cambodia (Tây Thành Province) into its territory
Location: Cambodia and Cochinchina