In the 19th century, what did most americans and industries relied on using?

In the 19th century Americans relied on the railroad to transport things from one end of the country to the other in a short amount of time

In the 19th century, the United States was marked by an industrial transformation through the development of the industrial economy.

Explanation:

The industrial transformation that the United States had in the 19th century was especially reflected by the rapid expansion of big business, the development of large-scale agriculture as well as the increment of national labor unions and industrial conflict.  

The farming took a very important role at that time principally in the field of big business because of the mechanization. This made the United States the world's premier food produce, a position it has never delivered.  

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answer-the island had airfields that the u.s. military needed.