[2][3] He belonged to the political party Democratic Rally of the Tahitian People (RDPT), led by his father.

[5] Marcel Oopa joined the Pacific Battalion during the Second World War, and fought in North Africa.

[3] In 1950 Marcel Oopa took part in the first May Day celebrations in the history of French Polynesia, participating in military uniform.

[3] His father had been allowed to sit by his bed, after intense pressure from Tahitian on the French authorities.

[7] Marcel Oopa's seat in the French National Assembly was temporarily filled by John Teariki, also from the RDPT.