|Province of Thailand|
|•||Franco-Thai War||May 9, 1941|
|•||Thailand returns annexed territories to French Indochina||1946|
|Today part of||Cambodia|
Phibunsongkhram Province (Thai: พิบูลสงคราม) was a former province of Thailand that existed between 1941 and 1946. It was created as a result of the annexation of Cambodian territory by Thailand following the 1940-41 Franco-Thai war. This province was named after Plaek Phibunsongkhram, prime minister of Thailand at that time.
The province was formed in 1941 after France ceded Siem Reap (excluding Siem Reap town and the Angkor Wat ruins ), Oddar Meanchey and Banteay Meanchey provinces to Thailand as a result of the Franco-Thai war.  The province was dissolved in 1946 and returned to France after the post-war French government threatened to veto Thailand's entry into the UN.
Phibunsongkhram was divided into six districts (amphoe):
|Name||Thai||corresponding to Cambodian|
|6||Chomkrasan||จอมกระสานต์||Choam Khsant District|
- Japanese occupation of Cambodia
- Nakhon Champassak Province
- Phra Tabong Province
- Franco-Thai War
- Thailand in World War II
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