What mountains have always impacted the ability of the new nation of the US to expand westward?

The Appalachian mountains. You can cross the Appalachian Mountains. Travel down the Atlantic coast. Explore the southern Mississippi River. Fight the Seminole in Florida. (If you were traveling with people when moving West) :)

the image shown is not a reliable source. it is not a photograph taken of the event, and it is not a painting created by someone who witnessed the event. the image can be considered yellow journalism because it is sensational and exaggerated. the explosion did not likely cause bodies to fly in the air or create a large fireball, as shown here. the image was created to make the american public angry about the explosion, not to show what actually happened.

the painting is not reliable.

the painting is exaggerated.

the painting is inaccurate.

the painting was created to make the public angry, not to show what really happened.