Sounds like his stutter may have been brought on by the stress of West Point, which would be a psychogenic, rather than neurogenic stutter. So, if Allen's stutter was psychogenic, it makes sense that the relief one feels at surviving a combat wound could have broken him out of the stress/anxiety that led to him stuttering in the first place. All that said, this isn't a lot of information to work on. But, it seems like most of us here are developmental stutterers, which is neurogenic; errors in our speech system lead to stuttering, not severe stress. So, even if he had to adjust the way he spoke after the wound - and the wound didn't look that severe based on his headshot - I don't think that's enough to improve fluency for a neurogenic stutter. Our issues come from a misfiring speech system. (So you should still try to avoid getting shot in the face.)