United states has over 145 million manpower available plus those ones from US Allies like Australia, South Korea, Japan, Canada, United Kingdom, Germany, France, Turkey and so on. Now in addition, United States commands the NATO army and Trump wouldn't want to use that to defeat North Korea. In fact, USA doesn't have to use more than 25000 troops to defeat that stupid boy in North korea and here we are talking about military strength, active personnel, Fighters and Interceptors, Weapons such as attack aircrafts and so on. Therefore, North Korea plus China plus any other that might want to join them are but a cockroach compared to the United States.
My guy the world is wise now and even some EU countries are against the US now. Come to think of it, Russian and China are backing North Korea and i know this is going to be a big problem if Donald Trump try to strike North Korea.