What was true of journeys from the east to west coast in the mid 1800s

During the early nineteenth century, when Thomas Jefferson dreamed of “a nation stretching from one glittering ocean to another” —the verse of the song “America the Beautiful” - it took ten days to get the chariot president across the 360 kilometers. from Monticello to Philadelphia. Even with a constant change of horses, the 170 kilometers from New York to Philadelphia required two days of intense travel in light diligence. At these speeds, the coasts of the country's wide territory were months apart.

a.) d-day invasion of normandy.

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b. native americans them