If now that you know that and you still think America has any interest in annexing countries for their resources then you are not right in the head.
America has no intrest in taking over any countries, least of all nuclear armed Russian swamplands. We have plenty of energy. plenty of land and plenty of money to buy anything Russia could ever offer.
America's long term interest are stable, peaceful, prosperous, stable democratic countries who's people can afford to buy our many products, services and technologies.