It is impossible to say with any certainty who would win a conflict, particularly if other world superpowers were dragged into the battle.
Donald Trump has said his first order as president was to renovate and modernise the US' nuclear arsenal, which he claims is "now far stronger and more powerful than ever before".
North Korea has been relentless in its nuclear tests and it is now believed the rogue state has missiles capable of hitting US territories.
The US spends far more on its military than any other nation and is the only country in possession of fifth-gen fighter planes - 187 F-22 jets, plus the F-35 which is not yet out of the testing phase.
But, it may not have an advantage over the rest of the world for long as Russia is developing a new stealth fighter nicknamed The Ghost and China is working on four.
In terms of submarines, the US Navy has 14 ballistic missile submarines with a combined 280 nuclear missiles.
They also possess four guided missile submarines with 154 Tomahawk cruise missiles each and 54 nuclear attack submarines.
