It wasn't America's fight.Compared to the main combatants, American involvement in WWI was minimal.
It was one of those fights that the USA should have steered clear of but got dragged into largely via British propaganda, and of course the explosion about the Lusitania that the British was using to ship in ammunition in violation of international law.
It remains that the Allies would have lost had not the Americans not entered the war in 1917, and on the battlefield in 1918, the battle lines would have stayed where they were at.
KowKow does not like to acknowledge the FACT that the British & French were losing in 1917 and 1918; that they did not have replacements for the loses.
WWI was a fight between COLONIAL MONARCHISTS- countries that where trying to hold on to land that did not belong to them in Africa, the Middle East, and Indochina and India.
The USA should have stayed out of it.