In 1863 the territory of New Mexico was divided in half and the western part b came the Arizona territory

"Arizona Organic Act"

Explanation:

In simple words, Mostly during Civil War, Congress approved the "Arizona Organic Act," which created the modern Arizona Territorial from the western section of the then 12-year-old New Mexico Territory and outlawed enslavement in the new State. Due to older Mexican traditions, regulations, and population patterns slavery was already severely restricted in New Mexico.

its whatever your mind tells you

c.) the country needed a stronger central government.