No.
No, it was not WW II.
There have been major battles through the time of the world, all with many different outcomes. Some include WW I and WW II, both of these outcomes were victorious for the allied troops.
WW II was largely the result of lingering resentment by Germany about the outcome of WW I. You could describe it in sports terminology as a rematch.
The camp which was built to train troops in WW I became a training area for for WW II. It was part of the area used for the Louisiana Maneuvers, a training exercise involving almost 500,000 men, preparing them for the battles of World War II.
There is no world war you. Your choices are WW I and WW II. The treaty which ended WW I was the Treaty of Versailles. WW II did not have a treaty as such, atlhough the Yalta Conference did produce an agreement.
About 16,000,000 troops from all participants were killed in both WW I and WW II so in that sense the death toll was about the same. What makes the big difference is that In WW II civilians in Germany, Japan, and England were targeted by the enemy and as a result 39,868,000 civilians died as a direct result of the war. That number does not include death camp deaths nor Stalin's purges.
Actually, it was largely because of the attack on Pearl Harbor. The US was already involved in the war financially, but they first deployed troops after that attack.
Almost every European country fought in WW II in some way (Spain had a civil war rather than participating in the general war, and was an ally of the Third Reich but did not send troops to their aid). Only Switzerland remained neutral.
Was created by the UN.
The most important different between WW I and WW II is there is a lot modern weapons and atomic bombs are used in WW II.
The location of his body remains unknown since WW II when his grave in Poland was opened and his body exhumed by Russian Troops.
The new Yugosolavian government proclaimed a policy of neutrality, but in April 1941, the country was invaded by German troops, assisted by Bulgarian, Hungarian, and Italian forces.