Relations between Iran and Russia continue to warm amidst an increasingly unstable geopolitical climate. The two allies signed a cooperative agreement this week, signaling Tehran and Moscow will lean on each other more as they similarly face a slew of Western sanctions.

Russian and Iranian officials say the "comprehensive strategic partnership treaty" covers all areas -— from trade and military cooperation to science, education and culture.

The agreement is focused more on trade than military issues, but it will bring two countries with a shared desire to challenge the West closer together.