Hey Tank, First and foremost, Thank you for your service!
I'm completely dairy and gluten intolerant. I eat a very strict, you might even say Spartan Paleo diet.
To add to what BtB posted.
Great carb source is sweet potatoes.
To bump up you kcal intake and get some much needed MCT's add in plenty of coconut products.
Don't be afraid of saturated fat.
Pretty typical day of eating for me is
Bfast - 1/4lb of bacon or 1/2lb of ground turkey, beef or pork, 8 whole eggs cooked in tallow, coconut oil or bacon fat, roasted sweet potato, 1 piece of fruit, 1 - 1/2 avocado
pre-train - 1 egg boiled, banana, green tea, 1-2ozs. 88% or darker chocolate
Lunch - fruit, 1.25 - 1.5 lbs of meat or fish, 10ozs, veggies cooked in meat fat or coconut oil
Dinner - 1.5lbs. of meat or fish, 10-12ozs. of veggies cooked in animal fat.
I have no problem eating 3,000 - 5,000+ kcals a day
"There's no such thing as shaping and toning. Only stronger and weaker." -Mark Rippetoe