Russia signed a strategic partnership treaty with Iran on Friday that follows similar pacts with China and North Korea. 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.

Russian and Iranian officials say the “comprehensive strategic partnership treaty” covers all areas -– from trade and military cooperation to science, education and culture. The 20-year treaty could be extended further.

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