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:
A protectorate is a state that is controlled and protected by another sovereign state. ... A protectorate is different from a colony as they have local rulers, are not directly possessed and rarely experience colonization by the suzerain state.
Congress thought President Lincoln was being to sincere and forgiving toward the Confederate side of the US (remember that they seceded from the Union and formed their own goverment which started the American Civil War).
There were many reasons for the Westward Expansion that conducted masses of Americans in the 19th century to the West. The most important were:
1) JOB OPPORTUNITIES.
2) MORE LAND.
3) MORE FARMING POSSIBILITIES.
4) FASTER TRANSPORTATION.
5) FREEDOM FOR RUNAWAY SLAVES.