North Korea is learning valuable lessons from fighting against Ukraine, making it an increased threat to its neighbors, a US official said. In recent months, North Korea has sent around 12,000 troops to fight for Russia against Ukraine as part of a new security pact between its leader,

North Korea has been under U.N. sanctions since 2006, and the measures have been steadily strengthened over the years with the aim of halting Pyongyang's development of nuclear we

North Korea is “significantly benefiting” from its troops gaining battlefield experience fighting alongside Russian forces as it makes them more capable of waging war against rivals South Korea and Japan,