Translate the following English sentence to French:
"I believe that this is exactly what has happened - a veil of silence has been drawn over events in Angola, a country which has been in a state of permanent war for 40 years and at civil war for 25 years."
Je pense que c'est exactement ce qui s'est passé, il y a eu un rideau de silence sur ce qui se passe en Angola, un pays en guerre permanente depuis quarante ans , dont vingt-cinq ans de guerre civile.