Translate the following English sentence to French:
"Their one aim was to defend the interests of their great banana companies which are effectively ravaging Latin America and which already dominate over 70% of the world market."
Le seul objectif était de défendre les intérêts de leurs grandes compagnies bananières qui effectivement sévissent en Amérique latine et qui dominent déjà plus de 70 % du marché mondial.