The combined Union Pacific-Central Pacific line became known as the First Transcontinental Railroad and later the Overland Route. The line was constructed primarily by Irish labor who had learned their craft during the recent Civil War.
In geography, there are three types of regions, <span>formal, functional and vernacular.</span>
Under the treaty of the Guadalupe - Hidalgo , the Mexican American War ended in favor of the United States , this also relinquished the United States with 525,000 square miles of land from the Southern Border
