Russian-Iranian relations began crystallize and expand significantly after the end of the Cold War and the disintegration of the Soviet Union in 1991, but these relations seemed cautious in the beginning, despite the existence of common interests between both countries represented to strengthen Iran's military and economic capabilities, Russia considered as a supportive partner in this field, in addition to nuclear cooperation where Russia was the only country that has not been subject to pressure from the United States and accepted the signing of the contract for the establishment of the Iranian nuclear reactor, In contrast, Russia has considered these relationships an opportunity to improve its economy, which suffered a strong tremor after the disintegration of the Soviet Union.