What did lester b pearson do for the military

What caused the united states to side with britain during world war i?

What event brought the us into wwii? what conflicts happened after the us entered the war? i know the first part of this question, i need with the second part.

Which side was right? write a paragraph in which you explain which side made a stronger argument and why. remember to use evidence from the lesson and from primary source documents you have read.