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  - Militarism -"Arms Race" for many countries -Many doubled armies size
 
 -Countries entered conflict purely because of alliances
 -As alliances became more involved, it became global
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  - Assassination of Archduke Franz Ferdinand of Austria (heir to the throne of Austria and Hungary) and his pregnant wife Sophie
- Austria-Hungary declared war on Serbia and WW1 begins
 
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  - Treaty of Versailles- Put Germany into debt and made them pay for most of WW1. 2.Failure of the League of Nations- Meant to keep world peace, instead failed
 
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  1939 Germany Invades Poland- Germany attacks against Poland and succeeds
 1944 DDay- US,lead by Eisenhower, attacked France to reclaim it from Germans. Succeeded, then Germany retreated
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  - 2 Global superpowers emerged- US and Soviet Union
- Founding of United Nations