While Moscow and Tehran have shared warmer relations for decades, a revival of the nations’ allyship occurred when the former invaded Kyiv.

The presidents of Russia and Iran have signed a broad cooperation pact to deepen their partnership amid stinging Western sanctions

For Moscow, Iranian President Masoud Pezeshkian's visit to Russia on Jan. 17 is a diplomatic victory. The trip's centerpiece will be the finalization of a long-heralded partnership deal between Russia and Iran,

What to know about the Russian-Iranian relationship:

Russian President Vladimir Putin and his Iranian counterpart Masoud Pezeshkian deepened military ties between their countries on Friday by signing a 20-year strategic partnership that is likely to worry the West.

Russian President Vladimir Putin and his Iranian counterpart, Masoud Pezeshkian, signed a broad cooperation pact Friday as their countries deepened their partnership in the face of stinging Western sanctions.

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.

The Kremlin says Russian President Vladimir Putin will host his Iranian counterpart President Masoud Pezeshkian this week for the signing of a broad partnership pact between Moscow and Tehran.

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

Iranian President Masoud Pezeshkian has arrived in Russia for the signing of a broad cooperation treaty as his country grapples with growing economic problems and other challenges