Bananas (1971)

Arrow Films

Woody Allen co-writes, directs and stars in this comedy. Puny New Yorker and gadget tester Fielding Mellish (Allen) is in love with Nancy (Louise Lasser), a beautiful political activist who is obsessed by the battles being waged in San Marcos between the dictator General Vargas (Carlos Montalban) and his revolutionary opponents. In an audacious attempt to impress his beloved, Fielding makes for San Marcos and in a bizarre and bewildering series of events, ends up becoming the president of the country.

Från IMDB:
When a bumbling New Yorker is dumped by his activist girlfriend, he travels to a tiny Latin American nation and becomes involved in its latest rebellion.