The phrase "mother of all battles" was used by Saddam to describe what he was promising to deliver in the 1990 Gulf War.

And it ended with him losing the fight with his air force demolished and him having to pull out of his beloved new province of Kuwait and giving it back to its previous occupants.

So the retreat was by Saddam.

Are you trying to say that the USA would also retreat from a new war begun with North Korea?

I put the odds of that at zero if America undertakes a new war with North Korea. If there is a new war with North Korea, the USA will finish off the 65-year-long albatross once and for all.