A shekara ta 1938, Gwamnatin Faransa ta nada shi gwamnan Indiya ta Faransa, mulkin mallaka wanda ya girgiza da tashin hankali a cikin masana'antun masana'anta. A yayin da sojojin Faransa ke fama da rauni a lokacin Yaƙin Duniya na II, Bonvin ya aika da sakon waya ga gwamnatin Faransa (a Bordeaux) a ranar 20 ga Yuni, 1940, yana bayyana nufin mutanen Indiya ta Faransa don ci gaba da yaƙin a gefen Allies. Duk da haka, bayan sanya hannu kan yarjejeniyar
Armistice na 22 ga Yuni, 1940, nan da nan ya amince da gwamnatin Marshal Pétain. Ba da daɗewa ba bayan haka, a ƙarƙashin matsin lamba daga Kanar Schomberg, British Consul a Pondicherry, wanda ya yi masa gargaɗi cewa Sojojin Indiyawan Biritaniya za su mamaye mulkin mallaka idan bai bayyana ga Janar de Gaulle ba, ya sake yanke shawararsa. A cikin kira ga mutane a ranar 27 ga Yuni, 1940, Bonvin ya ba da sanarwar cewa daular mulkin mallaka ta Faransa (sabili da haka Cibiyoyin Faransa a Indiya) "za su kasance a gefen Birtaniyya har zuwa nasara ta ƙarshe". A ranar 12 ga Yuli, Gwamna Bonvin, ta hanyar Birtaniya, ya tabbatar da De Gaulle game da hadin gwiwar Indiya ta Faransa.