As North Korean troops dispatched to Russia become increasingly involved in combat with Ukraine, China is upping its pressure on North Korea with crackdowns on North Korean workers.

(Reuters) - 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.

North Korea has renamed its DMZ entry permits and expanded travel permits for citizens of the capital, Daily NK has learned.

The U.S. “will have to out-think” Russia and China to prevent them from using nuclear weapons to resolve a future crisis, the outgoing head of the National Nuclear Security Administration said last week.

The U.S. Air Force has maintained a rotational presence of fighter jets at Kadena Air Base in Japan, which serves as an air power hub in the first island chain.

The impeached president is using unsubstantiated claims of election interference by China and North Korea to justify his failed self-coup bid.

The loose arrangement of hostile powers could pose a series of conundrums for President-elect Donald Trump’s pick for secretary of state.

With the fate of suspended South Korean president Yoon Suk-yeol hanging in the balance, the country has also been left facing an uncertain future as it battles through the resulting political turmoil.

Japan on Thursday formally inaugurated an independent mission to the NATO military alliance as Tokyo and NATO seek to bolster cooperation amid escalating tension from Russia, China and North Korea.

As he confronts Russia, China, North Korea and Iran, the president must understand what his adversaries have to lose.

Welcome to The Adversarial. Every other week, we’ll provide you with expert analysis on America’s greatest challengers: China, Russia, Iran, North Korea,