UN Security Council Resolution 2231 was formulated in October 2015 for a period of 10 years. In this resolution, the Security Council adopted the nuclear agreement between the 5+1 Group and Iran and included the imposition of sanctions on Iran if it violated the resolution. Now, with the resolution expiring, new and old horizons have opened up for Iran to develop military ties, especially in the nuclear and missile fields.Military relations between Russia and Iran are particularly dangerous