Whats the name for a geographically wide-ranging group of peoples and states ruled by a single government

What is the name for the main idea behind the settling of western lands by americans in the early-1800s?

What were four reasons for the decline of spain as a world power

Which of the following accurately describes the workforces of the united states and canada? a. most of the workforce in the united states and canada is employed in the service industry. b. most of the workforce in the united states and canada is employed in the educational field. c. most of the workforce in the united states and canada is employed in manufacturing and mining. d. most of the workforce in the united states and canada is employed in agriculture.