Archduke Franz Ferdinand, Archduke of Austria-Este's assassination triggered WWI
The British Government responded to the colonials rebellion by Enacting the Tea Act, The Sugar act and more. Basically these acts were made to raise taxes. The colonist did not like the raise of even more taxes and resented by hosting boy cotts and open rebellion against the king.
The correct option will be the last one: The Indians crossed artificial boundaries setting the stage for conflict. We know this because even though The US agreed to pay the various nations a cash payment every year as restitution for damage caused by white settlers' wagon trainsand the Native Americans agreed to limit themselves to a certain geographical area, to stop harassing white settlers, some people like the <span>Lakota Sioux refused to abide by it.</span>
Athens is still a major city in Greece. It is currently still the capital.