How did imigration and weastern expansion impact the geographic patterns in the united states

Westward expansion meant that the US acquired ever increasing amounts of land, and needed people, farmers, to settle there so it could maintained without a huge military presence.  This led to massive immigration in the second half of the 19th century, as mostly Europeans came here seeking to finally have their own land.

It also added vast resources to the United States, both in terms of potential agricultural production and things like gold, silver and timber.

It stimulated the construction of the Transcontinental Railroad, and added new states to the country.

It further aggravated the divide between north and south, and accelerated the onset of the Civil War.

Explanation:

the proximity of water was an advantage to western europe and its culture was able to flourish as a result. trade and travel by sea were easier and safer in historical times.

1. there are no mountains to protect it from the sea

2. and its has wet cool summers and wet, mild winters.