The 4 Most Dangerous Countries, According To Army Chief Of Staff

Army Chief of Staff Gen. Mark Milley has ranked four nations as the greatest threat to American security.
Earlier this year, Army Chief of Staff Gen. Mark Milley ranked four nations as the most dangerous to U.S. national security: Russia, China, Iran, and North Korea.

Though there was no definitive ranking of these nations, he stressed that Russia is number one, according to Breaking Defense.