The philosophy drove 19th-century U.S. territorial expansion and was used to justify the forced removal of Native Americans and other groups from their homes. The rapid expansion of the United States intensified the issue of slavery as new states were added to the Union, leading to the outbreak of the Civil War.
Irrigation is a way of watering plants. There are many types of irrigation. Such as drip irrigation, surface irrigation, and sprinkler irrigation. Irrigation is mostly seen as channels of water helping to water plants.
