People living in the middle
Bob ross
no
Lincoln's assassination
The Oklahoma Land Rush
railroads.
The battle of Midway
Nova - 1974 Alaska The Closing Frontier 5-21 was released on: USA: 28 June 1978
isolationism
Oklahoma Land Rush ended the frontier
it has already ended sorry
Abraham licon wanting to stop slavery
planet venus arriving in the evening sky
The breakup of the Soviet Unionvand the destruction of the Berlin wall in 1989