Is American Southwest the full name?
No.
What is the more formal name of the region?
The Southwestern United States.
Does it cover a definite area?
No.
Is Arizona generally included?
Yes.
What is the largest city area in the region?
Phoenix
How many people are included there?
over 4 million
Are there deserts in the region?
YEs
What is one of the deserts?
Mojave
Are there any waterways in the region?
Yes.
Any big rivers?
Yes.
How many?
Two
Which ones?
Colorado River and Rio Grande
When did most of the region become part of the US?
1848
What allowed this land to be part of the country?
Treaty of Guadalupe Hidalgo