With Pyongyang, Tehran, and Moscow all facing sustained US pressure, there is the real possibility of this trilateral partnership cementing and bringing with it greater global instability. For instance, Iran could learn more than a thing or two from North Korea regarding the development of a nuclear weapons program under the pressure of international sanctions. This, paired with its capability of attacking Israel, also strengthens Tehran’s diplomatic leverage over Washington.
These combined dangers represent a nightmare scenario for the United States, which has long warned of cooperation between these powers. US State Department spokesperson Matthew Miller said this month that the US was “incredibly concerned” about Iran working with North Korea to pursue nuclear weapons and ballistic missiles.
North Korea is also likely to benefit from close ties with Iran. First, it could give North Korea another source of military technology beyond just Russia. Second, increasing trade and other forms of economic cooperation with Iran could also provide North Korea's regime with much-needed foreign currency.
But the true worst-case scenario for the United States would be the materialisation of a North Korea-Iran-Russia military partnership resulting in security threats that span Europe, the Middle East, Asia, and beyond. While the US-South Korea-Japan partnership has been mainly focused on countering China’s rise and the threat coming from North Korea, the addition of two major players such as Iran and Russia to the mix would greatly impact regional and global stability.
As the past few decades have shown, continued pressure in the form of sanctions or international isolation is not a strategy likely to bring about positive results. As such, Washington must double down on reviving diplomatic efforts with both Pyongyang and Tehran to advance non-proliferation and arms control goals, prevent the two from engaging in closer cooperation with Moscow, and avert the escalation of conflict in the Middle East. Only through sustained diplomacy can tensions be peacefully deescalated and further conflict prevented.