sentences:  Admiral Darlan, who had been opposed to an armistice until 15 June, now became a key player, agreeing provided the French fleet was kept out of German hands.On Sunday 16 June President Roosevelt's reply to President Lebrun's requests for assistance came with only vague promises and saying that it was impossible for the President to do anything without Congressional approval.Pétain then drew a letter of resignation from his pocket, an act which was certain to bring down the government (he had persuaded Weygand to come to Bordeaux by telling him that 16 June would be the decisive day).