Which invention significantly changed the cattle industry and ended the era of the open range?

The “New Frontier” described:

What was the primary purpose of federal forts like Fort Laramie?

The “direct primary” was a reform intended to:

Where was the first transcontinental railroad completed in 1869?

Which group was most responsible for spearheading causes like child labor reform during the Progressive Era?

Ronald Reagan’s core economic theory was:

What happened to the number of patents issued in the U.S. between 1860 and 1900?

Before the 1840s, how did many early explorers describe the Great Plains?

Why did the film industry move to Hollywood?