Answer
Guerra Fria
Explanation:
Nesse periodo EUA e URSS não teve um conflito direto.Apenas teve competições como quem iria primeiro para a lua(corrida aeroespacial).
In 1862 Congress passed the Pacific Railroad Acts which designated the 32nd parallel as the initial transcontinental route and gave huge grants of lands for rights-of-way. The legislation authorized two railroad companies, the Union Pacific and the Central Pacific, to construct the lines.
I think it's the 16th, but not completely sure.
