From MEMRI:   The Russian military recently held its annual RUBEZH ("Border") maneuver in the Caspian Sea region. The Iranian website Baztab, affiliated with Expediency Council Secretary and former Revolutionary Guards commander Mohsen Rezai, presented the maneuver, based on a report in the Central Asian press, as aiming to prepare the Russian army to respond to a possible U.S. military assault on Iran.

Some believe that the maneuver, which was planned by the Russian military's joint chiefs of staff, was an exercise in preparedness for frontal confrontation in a possible American war against Iran in the region of southern Eurasia and in the Caspian Sea region.

http://www.memri.org/bin/opener_latest.cgi?ID=SD129606