With no offense intended if it was simply intended to be a plot development, it really seems to me to be more of a really game-y means of countering the size of the Commonwealth, which I wholeheartedly disagree with. That's my two cents. This is a RP after all, not Risk. We're not here to paint the map but to make a story.

It's unrealistic, but not in the sense that this game is 'unrealistic' (giant robots, power armor, gauss rifles, different geopolitical boundaries), but that it's completely unfeasible.