Depends on the disability rating. If he is found to be at 30% disabled, he gets a pension and all the benefits of being a military retiree, which are almost the same as being active duty. If he gets less than 30%, he gets severance pay and is not a retiree. If they give him less than 30%, he should appeal. The first appeal is done with him in person. If he is not happy with that, there is a second appeal not in person. Either can raise, lower or keep the ruling the same. whatever he is left with, he can make a separate claim to the VA. If they accept his claim, h gets both VA benefits and military retiree benefits, but if both offer him a monthly check, he must choose between them. Generally, the army is more generous to those more severely injured and/or who have been in longer. The VA is more generous to those less injured or with shorter time in uniform.