Its the Gold Rush which occured in 1848.
Answer:
The history of America started in 1492.
Explanation:
The story of America begin in 1492 with the arrival of Christopher Columbus who was an Italian explorer. Before 1492, the america is a place where the culture of the native people progress and free from the European contact and their conflict. With the discovery of America made by Christopher Columbus, the Italian started colonizing in these areas due to attaining resources such as gold, silver and other valuable products.
B) Kennewick man
He died in present day Washington State and he should have migrated in what was known as the Beringia land bridge thousands of years ago, making his way from Asia into the Americas.
You must be talking about the assassination of Archduke Franz Ferdinand of Austria. This was an event which triggered the start of WWI.