Which cabinet position was added as a result of westward expansion ?

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."

it was the first major victory for the colonists.

but equal

explanation:

plessy v. ferguson (1896) is an important us supreme court decision that kept racial segregation based on "separate but equal". however, these racially segregated trains and places were not actually equal. plessy v. ferguson (1896) was finally overturned by brown v. board of education in 1954.