The Allied faction, most notably the British, has gained the upper hand during the first world war due to their acquisition of various oil fields. The oil has powered their military vehicles most notably its naval fleet and the introduction of Mark V tanks that posed significant advantage at the course of the war.
The United States emerged as a leading world power after world war I due to the treaty of Versailles. This is my best answer. I hope this helps! :)
A Constitution is: <em>C</em>
What was the first constitution of the USA: <em>D</em>
It is very emotional and inspiring
