In the Treaty of Paris, the British Crown formally recognized American independence and ceded most of its territory east of the Mississippi River to the United States, doubling the size of the new nation and paving the way for westward expansion.
Answer: Originally, the whole point of the war was to preserve the Union. However, the Emancipation Proclamation made the war about the abolishment of slavery.
Rocks or Dirt. Most of the time geologist will use these to determine factors from the surrounding area such as how old it is, as well as how long its been there.