 Pari gbolohun yii: Lẹyìn tí Japan wọ Indochina ní 22 September 1940, ìjọba Thailand, lábẹ ìdarí tí wọn fẹràn Japan, Field Marshal Plaek Phibunsongkhram, tí wọn sì fún lókun nípasẹ àdéhùn ọrẹ tí wọn ṣe pẹlú Japan, gbógun ti French Protectorate of Cambodias western provinces to which it had historic claims. Lẹyìn tí : Ogun Franco-Thai, Tokyo gbalejo ibuwọlu ti adehun kan ni Oṣu Karun ọjọ 9 ọdun 1941 eyiti o fi agbara mu awọn Faranse lati fi idamẹta kan ti agbegbe oju-ilẹ ti Cambodia silẹ pẹlu fere idaji miliọnu awọn ara ilu. 