China-Russia Strategic Alliance against US Unilateralism and its Impact on Iran's National Security 2009-2021

After the collapse of the Soviet Union, the structure of the international system took on a unipolar form, one of its main characteristics being the unilateral approach of the United States as the ruling superpower. But Russia and China have managed to compete and challenge America in the position of great power. This competitive process has also affected the national security of other countries. The main goal of this research is to investigate the impact of the alliance between Russia and China against the unilateralism of the United States on Iran's national security. The main question is, what effect did the alliance between Russia and China have on Iran's national security in 2009-2021 against the unilateralism of the United States? It seems that the strategic alliance of China and Russia based on competition and curbing the hegemony of US has had effects in the direction of strengthening and weakening the national security of Iran. The results show that the alliance between China and Russia against the United States affects Iran's national security in the political dimension Iran's emphasis on the role of the United Nations, Iran's membership in the Shanghai Organization, seeking new horizons in BRICS in the military dimension countering Western sanctions and promoting military cooperation with China and Russia in the economic dimension enhancement of economic cooperation, purchase of Iranian oil and gas and Iran's pivotal capability in China's Silk Road project and in the environmental dimension of the cooperation of the two sides with Iran.