can an army husband get into trouble hitting his wife? if so what can happen?

UCMJ Art 128 (a) (2)

As mentioned they could have disciplinary action taken against them, however, it could be as little as counseling. The military doesn't just jump right into UCMJ with a court martial otherwise there would be a lot more unemployed Marines. It's strictly up to the commander on whether or not to seek charges. If it's his first offense, most likely he'd be given a Memorandum of Record (or Letter of Reprimand) and then watched for further infractions. If he's done it before, he'd likely have higher disciplinary actions taken against him. I have seen Army spouses beaten and just a piece of paperwork given to the soldier.

However, that was after the wife insisted on not pressing charges. The wife should ensure she keeps her self respect and not allow him to lay his hands on her again. It's way too often that abuse happens and the wife allows it to continue just be staying. If she removes herself from the situation, it can't continue. I know it's harder to leave a man, especially if he's the one making the majority of the money. But no money, or self respect is worth getting hit. I truly wish and pray for the best situation for whomever this question is for.

Like kinch stated this is covered under UCMJ article 128 - assault

these most likely apply to you

(1) Simple assault.

(A) Generally. Confinement for 3 months and forfeiture of two-thirds pay per month for 3 months.

(B) When committed with an unloaded firearm. Dishonorable discharge, forfeiture of all pay and allowances, and confinement for 3 years.

(2) Assault consummated by a battery. Bad conduct discharge, forfeiture of all pay and allowances, and confinement for 6 months.

(7) Assault consummated by a battery upon a child under 16 years. Dishonorable discharge, forfeiture of all pay and allowances, and confinement for 2 years.

(8) Assault with a dangerous weapon or other means of force to produce death or grievous bodily harm.

(a) When committed with a loaded firearm. Dishonorable discharge, forfeiture of all pay and allowances, and confinement for 8 years.

(b) Other cases. Dishonorable discharge, forfeiture of all pay and allowances, and confinement for 3 years.

(9) Assault in which grievous bodily harm is intentionally inflicted.

(a) When the injury is inflicted with a loaded firearm. Dishonorable discharge, forfeiture of all pay and allowances, and confinement for 10 years.

(b) Other cases. Dishonorable discharge, forfeiture of all pay and allowances, and confinement for 5 years.

As far as I remember they can be court marshaled. I mean hell they can get in trouble for cheating so why not for hitting?

Yes!

hell yes