The White House says that North Korea has delivered more than 1,000 containers of military equipment and munitions to Russia for its ongoing war in Ukraine. Speculation about a possible North Korean plan to refill Russia’s munition stores drained in its protracted war with Ukraine flared last month, when North Korean leader Kim Jong Un traveled to Russia to meet President Vladimir Putin and visit key military sites.
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It's the official name of the country.
Iran is officially the Islamic Republic of Iran too, though. Most countries are like that. Republic of Finland, United Kingdom of Great Britain and Northern Ireland, Federal Republic of Germany, Russian Federation etc.