The Russian Revolution (1917)
The Russian Revolution was a period of social and political uprising across the Russian Empire. The revolution lasted for six years until 1923 when the Bolsheviks established the Soviet Union at the end of the Civil War. This time period debuted the iconic hammer and sickle as a representation of the Communist party.
The Wrights Fly the First Powered Aircraft (1903)
The Wright brothers were two aviation pioneers credited with inventing, building, and flying the world's first motor-operated airplane. The Wright brothers' plane was recognized as "the first sustained and controlled heavier-than-air powered flight."