"A few weeks previously Leahy had come to King's office one day and said that the President would like to have King cease using the customary term Commander in Chief, both in respect to the United States Fleet and the Pacific and Atlantic Fleets, and to alter these designations to Commander, United States Fleet, Pacific Fleet, or Atlantic Fleet, as the case might be. Thus there would be but one Commander in Chief, and that the Commander in Chief of the Army and Navy. King asked Leahy if that were an order or a request, and was told that it was not an order or a request, but the Leahy knew that the President would like to have it done. King therupon told Leahy that if Mr. Roosevelt issued an order, or a request, he would of course have to comply with it, but Leahy said that the President said that the President did not wish to issue a definite order, but simply would like to have it done. That was the last that King heard of that particular matter, but it came to mind when he heard of the President's forthcoming visit to Hawaii."
January 1, 1970
https://en.wikiquote.org/wiki/William_D._Leahy