.The implication of preparing to move Russian troops not only is to protect its own vital regional interests but possibly to assist Iran in the event of such an attack. Sources add that a Russian military buildup in the region could result in the Russian military potentially engaging Israeli forces, U.S. forces, or both.
Informed sources say that the Russians have warned of "unpredictable consequences" in the event Iran is attacked, with some Russians saying that the Russian military will take part in the possible war because it would threaten its vital interests in the region... ://www.businessinsider.com/russia-thinks-an-israeli-attack-on-iran-by-the-summer-is-almost-certain-2012-4
