The philosophy drove 19th-century U.S. territorial expansion and was used to justify the forced removal of Native Americans and other groups from their homes. The rapid expansion of the United States intensified the issue of slavery as new states were added to the Union, leading to the outbreak of the Civil War.
England backed down due to economic pressure
I don't get your question
World War I was called the Great War. People thought that it would be the war to end all wars.
Hope that helps
Once they were across the River Jordan they attacked Jericho, killing every single man they could even the women and children