There were many reasons. The country was in extreme poverty, there was starvation everywhere and people were dying in misery. They wanted to change the imperialistic rule and impose their own bolshevik rule. People also wanted to end their participation in the war which is one of the first things that happened after the revolution. The communists left the war before the war ended.
The Roman empire reached its peak under the leadership of Trajan in 116 A.D
the empire endured great prosperity during the Pax Romana.
The ninth president was William Henry Harrison. He became president in 1841 and served for just a month before dying of pneumonia.
The correct answer is the battle of gettysburg