If people got fatter with an extra 50-100 grams of carbs, why not recommend removing the 'extra' carbs, instead of almost all of them?
I don't understand why grains are labelled as crap.
I know they aren't as nutritious as vegetables, but lots of fat isn't expecially nutritious, either, is it?
Is the Asians are adapted to carbs idea proven?
As for the oririginal topic -
I wouldn't suggest making major dietary moves away from carbohydrates, which will surely work for military training, whereas a low carb diet might be a big problem for you, in practical or physical terms, also with perhaps having to change from one diet to another when training begins, with associated problems, regardless of whether its better for you in the long run or not. Try it later, if you want.