http://www.gjenvick.com/Immigration/Medical-Mental-InspectionOfImmigrants/1917-05-18-MentalExaminati...
Answer:
When did many African groups begin to challenge European colonial
rule? African groups began to challenge European colonial rule after ww2
Because he was assassinated by Serbian rebels. Most of Europe was allied with someone, a tangle of alliances. Serbia was allied Russia. Austria-Hungary didn't like Serbia. Well when the Archduke decided to visit Sarajevo, he was assassinated by a Serbian assassin. Because of that, Austria-Hungary wanted to punish Serbia and declared war. Well Austria-Hungary was allied with Germany and Italy. And Serbia was allied with Russia. Well Russia attacked Austria-Hungary and Russia was allied with both Great Britain and France.... So it triggered a chain reaction like that.
