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The Holocaust.
The assassination of Archduke Ferdinand was the one event that pushed Europe over the edge and brought about World War I.
The bombing of Pearl Harbor
The perimeter is the sum of the sides of a polygon. So, to find the perimeter of a pentagon, you need only to add up the 5 side lengths. In the event the pentagon is regular (all equal sides and angles) then you can multiply the measure of the side by 5 to get the perimeter.
Subduction.
Was supposed to be feb 28th and it is now pushed back one week.
The bombing of Pearl Harbor on December 7, 1942.
The election of Lincoln as president.
the earl canal
The flooding of the nile river
The assassination of President Abraham Lincoln is one event that turned the American public opinion.
The secession of South Carolina from the Union