Here's a suggested clearing process:

• Identify what's triggering you
• Feel clearly in what part of your body you feel the triggered emotion (that culminates in the rage)
• Clear that emotion

Here's an example of applying this process to your specific situation...

Identify The Trigger

Seems like her tone of voice could play a part in being your trigger because you say...

The tone I hear her voice go to makes me angry. I try to control it but I get loud and then I'm numb and couldn't care less what happens

You may later notice additional triggers within yourself such as her facial expression, the subjects she brings up, her gestures etc.

Feel The Emotion Clearly

The next time you are calm and centered within yourself (and away from her), deliberately conjure up that tone of voice in your mind.

If that is the trigger, you will feel an uncomfortable sensation in a part of your body. Try to make that sensation as strong as you possibly can in that part of the body so it's as clear to you as it can possibly be. It will feel counter-intuitive to do this because normally we try to suppress uncomfortable emotions, not make them even more uncomfortable :)

That's why it's a good idea to do this when she's not around otherwise making the emotion stronger may lead you into action (i.e. another round of rage against her) which is what you are trying to avoid.

Clear That Emotion

There are many techniques around Inward Quest for "clearing" bad-feeling emotions. If you are new to all of these mind-power-style subjects then EFT might be the place to start. It's quick to learn and easy to apply. You can learn it from YouTube in a few minutes.

Just do your EFT tapping while the emotion (identified above) is at its strongest within you so it's probably a good idea to learn the EFT tapping process first before starting this entire clearing process.

If this clearing process has been effective, you should notice an automatically different reaction within yourself the next time you feel "triggered" by her. If that's not still the reaction you want, just repeat the above process using different identified "triggers" if necessary.

If you keep going with this clearing process until there's nothing left to "trigger" you, you'll find that you'll remain completely calm regardless of what she says or does...and you won't even have to try :)

A couple of questions @wilfredo85 and a couple of thoughts...
What you shared with us have you you shared this with your wife?
In your profession in the military you are required to be strong and tough. Don't hold back those so called "weaker" emotions at home, they are actually a sign of strength and trust in a relationship!
Do you know how to meditate? You say you run and workout. These things help you quiet your mind ,true? A workout for for you inner-self is as important as a workout for your physical body.A quiet mind is a strong mind.
Stress? To quote Eckhart Tolle

"All negativity is caused by an accumulation of psychological time and denial of the present. Unease, anxiety, tension, stress, worry - all forms of fear - are caused by too much future, and not enough presence. Guilt, regret, resentment, grievances, sadness, bitterness, and all forms of non-forgiveness are caused by too much past, and not enough presence." ― Eckhart Tolle, The Power of Now: A Guide to Spiritual Enlightenment

So... a couple of recommendations from a man that has been married close to 30 years. Make "I Love You" the last thing you say to her everyday. Don't go to bed angry, work it out. Don't think of divorce, if you are truly in love and the the thought of not growing old with her scares you ,don't think of divorce. Make it the D word,something you just don't say.
Love between two people is an ever growing thing. And it needs to be nurtured.Like a plant needs water. Express your love often and always,whether you do it with words, gifts ( an unexpected rose ) ,text messages (Remember what is was like when you were courting her I bet there was a lot of texting back then, do the same again), gestures ( You know there is stuff to do around the home that she wouldn't expect you to do .. just do it!).
Remember "It's better to be happy than right" So if she starts to vent and that pushes your anger button, be quiet ,listen through what she has to say, respect her opinion take it to heart.
Read "The Power of Now" by Eckhart Tolle and Abraham Hicks - Ask and it is given. and I would listen to them also the audio books are great for these two.

peace