Often, the president is the controller of the military. with that in mind, there is a much better way to expand their borders or make war. in today's information age, the ways of winning territory are very different to putting up a fence and hoping you find gold or oil in that territory, as, the natural resources are not as valuable as cities and towns. So, it stands to reason that wars are fought about cities and towns, yes? this will grant you tax money, guaranteed, and also income taxes and so forth. if you were to be faced with annihilating a city to beat your enemy, you would lose that city's ability to generate money immediately, yes? Now, if you were to 'buy that city,' some of the businesses inside of it, then you would make money. instead of paying for bombs, paying for rebuilding and paying for capital, you would be able to 'pay for appreciating assets,' yes? this would see 'your empire' gain wealth, and then you could buy the cities, at a price, as you would own everything inside them - state owned? - so it would be on your land as if it were an embassy, of course.