The edge of civilization, beyond which is wilderness

to get bigger

urban

rural

transcontinental

The land ceded to the US by Great Britain in the treaty of 1846

to add on

to buy

land USA bought from France and which was explored by the Lewis and Clark expedition

In 1823, this US President announced that European countries were no longer allowed to start colonies or use their militaries anywhere in the Americas.

Land belonging to the US which was not yet organized into a state.

A law passed by Congress in 1838 which required all Natives to move west of the Mississippi River

The name given to the several trails traveled by Native Americans during their forced migration during the 1830's.

to give up; give up something

The Republic of Texas joined the USA as the 28th state

When Mexico lost the Mexican American War, it ceded this land to the USA

The belief that the USA had a God-given right to expand to the Pacific Ocean.

A man-made waterway that connects two bodies of water

agriculture

industry

A period of mass migration to California beginning in 1849 and lasting through the 1850's

Migrants who rushed to California looking for gold were known as...

a wagon road that connected Independence, Missouri to Oregon City, Oregon

a person who is among the first to explore or settle a new country or area

a wagon road that connected Independence, Missouri with Santa Fe, Mexico.

to move from one place to another

Land the northern border of Mexico for which the USA paid Mexico $10 million

The woman who acted as a translator and guide for Lewis and Clark