The Union victory did solve a handful of problems, it abolished slavery and get rid of the Confederate Union but not every problem could be solved. Personally I would disagree because the Civil War had other problems right after because of the victory.
The locals were oppressed as the imperialists took advantage of the rich resources for their own gain making the situation worse.
The variety of information is for example:
archaeological find
primary sources, such as video recordings, sound recordings or testimonies of wittnesses
background and context information
linking dependencies and motivations (for example: what was the motivations for the crusades?)
they collect this information to provide a comprehensive account of the events, but they do take into account that any new information could change how we view something.
Answer:
PLEASE MAKE SURE YOU HAVE PUT THE PROPER QUESTION AND IT IS COMPLETE