Answer:
Beheading by guillotine
Ultimately unwilling to cede his royal power to the Revolutionary government, Louis XVI was found guilty of treason and condemned to death. He was guillotined on January 21, 1793.
Nice guess :) Can I be brainliest?
Evolution of guns or you could say weapon technology
The Monroe Doctrine. Washington warned the populous in his farewell address to avoid permanent relationships with foreign governments. This was stated again it what became known as the Monroe Doctrine from President James Monroe, in which he bolstered the position of the United States defense of the western hemisphere and warning foreign governments, especially those in Europe to stay out of North and South America, even through proxies and puppet governments.
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.