write if these cause the expansion of the U.S, or if the expansion of the U.S is an effect
lewis and clark expedition:
war of 1812:
Monroe doctrine

Respuesta :

Answer:

~Senpi Boi here~

Explanation:

The Westward expansion is the 19th-century movement of settlers into the American West that began with the Louisiana Purchase and was fueled by the Gold Rush. The Oregon Trail and a belief in manifest destiny.

(Hope this helps!)