Of course not. Not any of these nations have any substantial military force or biochemical weapons, and countries that do, with the exception of North Korea, have not intentions of using them. We were closer to having a third World War during the Cold War between the United States and Russia than in any recent time. Two extremely suspicious adversaries with the largest possession of nuclear arms.
Fun Fact: Had we done anything but successfully blockade Cuba during the Cuban missile crisis, Russia was planning on releasing its nuclear missile barrage on all major cities on the East coast of the United States. Isn't history fascinating?