"If I got the dates right, he got two in a three week period! "
And from what I understand from other articles, the first was received within 24 hours of his arrival in Vietnam. Fast work!
From his military records - purple hearts for scratches - my guess is the military couldn't stand his whining and belly aching any more and wanted to get rid of him. That could be why they got rid of him in 4 months. 3 scratches and he thinks he knows what it feels like to almost die ? Who could stand to be around a guy like that for more than 4 months?