I remember the draft situation. Nixon got rid of the student deferrments. There was a lottery system. If you got a low number you went into the army. If you were lucky and got a high number you did not get drafted. Trump deferred his exposure through the 2S deferrments. When he was about 23 years old he got a lucky number. I wonder how he got the 1Y status.
And the 2/1/72 reclassification to 4F is also odd. Of course it was irrelevant after he got #356 and the war was winding down. Some medical problem must have cropped up to get the 4F. Things like bad vision, bad knees, etc., could result in a 4F.