How much land did the United States have *BEFORE* the Mexican-American War? Please answer quickly.

the United States gained more than 500,000 square miles (1,300,000 square km) of land, expanding U.S. territory by about one-third.

I found that gained but I could not find the before ;-;

Hope you get the correct answer you got this

answer; /// slavery should be outlawed in the new country, was part of the initial draft of the declaration of independence, but not part of the final