What to know about the relationship between Russia and Iran:

Russian President Vladimir Putin and his Iranian counterpart, Masoud Pezeshkian signed a new strategic cooperation pact as the two countries brace for the return of U.S. President-elect Donald Trump to the White House.

Russia and Iran plan to sign a new 20-year treaty, and it is missing a key element in its territorial integrity clause: Crimea.

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.

Russian President Vladimir Putin welcomed his Iranian counterpart, Masoud Pezeshkian, on Friday to formalize a significant agreement between Moscow and Tehran.

Hal Brands is a professor at the Johns Hopkins University School of Advanced International Studies, a senior fellow at the American Enterprise Institute and a columnist for Bloomberg Opinion. This essay is adapted from his new book, “The Eurasian Century: Hot Wars, Cold Wars, and the Making of the Modern World.”

From Syria to Libya to Georgia, Putin's grip on his global empire is loosening. Thus far only Turkey and Israel benefit. Will the West rise to the occasion too?

All three countries are adversaries of the United States, and Russia has used its ties with them to help blunt the impact of Western sanctions and boost its war effort in Ukraine. Presidents Vladimir Putin and Xi Jinping met in Beijing on Feb.

Vladimir Putin’s Russia is embroiled in war and plagued by systemic decay — and Donald Trump can exploit its weakness to end its campaign of global instability.

on Russian Foreign Affairs Minister Sergey Lavrov's, previous comments about the treaty: "Lavrov's comments on the Russia-Iran Comprehensive Strategic Partnership Treaty: The treaty will solidify ...

Iran and its hapless proxies have now become a liability to Putin’s machinations to recreate a Peter the Great-like Russian empire. All of this is the result of Putin’s ill-fated decision to ...

Iran, in turn, wants sophisticated Russian weapons like long-range air defense systems and fighter jets to help fend off possible attacks by Israel. Tehran long has hoped to obtain advanced Sukhoi ...