The immediate cause of World War I that made the aforementioned items come into play (alliances, imperialism, militarism, nationalism) was the assassination of Archduke Franz Ferdinand of Austria-Hungary. In June 1914, a Serbian-nationalist terrorist group called the Black Hand sent groups to assassinate the Archduke. Hope this helps, plus this was the main reason why it happened plus if you see a link other people offer for the answer don’t put it in the web, I tested it out I got a virus. Anyways hope this helps!
Allowing free elections in eastern europe.
W crop civilization in the America’s believed to have originated in the area of South America and Mexico
Originally the United States only had atomic weapons, but that all changed when in 1949 the U.S.S.R (or the Soviet Union) set off an atomic bomb, which started the Nuclear Arms race.
Hope this helps, have a BLESSED day! :-)
