Congress
congress
Judical
The part of government that decides how new states are admittes is Congress. This is from Section 3, Clause 1 in Article 4 of the Constitution of the United States.
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House of Representatives
Indiana was admitted to the Union on December 11, 1816 becoming the 19th state admitted to the Union.
Louisiana is a part of the United States; it is the 18th State to be admitted to the US.
The last state in the continental United States to be admitted to the Union was Arizona. It was admitted on February 14, 1912. Not long before that, New Mexico was the 47th state to be admitted on January 6, 1912. Of course, Alaska and Hawaii were admitted after Arizona in 1959, but they are not part of the continental states.
In 1848 it was admitted into the United States Of America.
Same as now except for Alaska (admitted 1959) and Hawaii (1960). Therse were the first new states admitted since New Mexico and Arizona in 1912.
In order for Missouri to be admitted as a Slave State, Maine was admitted as a Free State.
Missouri was admitted as a slave state, but no more slave states would be allowed anywhere North of the parallel that marked Missouri's Southern border.