Lao–Siamese War (1778–1779)
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Lao–Siamese War or the Siamese Invasion of Laos (1778–1779) is the military conflict between Thonburi Kingdom of Siam and the Lao kingdoms of Vientiane and Champasak. The war resulted in all three Lao kingdoms of Luang Phrabang, Vientiane and Champasak becoming Siamese tributary vassal kingdoms under Siamese suzerainty and domination in Thonburi and the subsequent Rattanakosin Period.

