[Source:] ... Truman drafted an order to MacArthur, which was issued under Bradley's signature:
I deeply regret that it becomes my duty as President and Commander-in-Chief of the United States military forces to replace you as Supreme Commander, Allied Powers...
You will turn over your commands, effective at once, to Lt. Gen. Matthew B. Ridgway. You are authorized to have issued such orders as are necessary to complete desired travel to such place as you select.
If it were truly Truman (the pun is fortuitous) who wrote this letter, why did he use present perfect? GA MacArthur first learned of his dismissal here, so there's no past issuance of orders to justify this tense?