The US could use a variety of economic, military and ideological strategies to “overextend and unbalance” Russia, a new report sponsored by the US Army glaringly suggests, offering blueprints to divide and destabilize the country. The study examines “nonviolent, cost-imposing options” that the US and its allies could employ to weaken Russia’s economy, military and government structures — and was conducted by the RAND Arroyo Center — the US Army’s federally funded research arm. While US officials and mainstream…