The Union Pacific and the Central Pacific hired many immigrants
from what two countries?

By the time the Union Pacific and Central Pacific railroads met in Utah in 1869, Central Pacific had recruited thousands of additional workers directly from China. When the Transcontinental Railroad was complete, Chinese laborers made up over 90 percent of Central Pacific's workforce.

Explanation:

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aliens are not real, the myth was created about 700 years ago because people found markings in the field of their crops. also, no there were no aliens on the moon.

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