I have tree questions on History. What is the name of the land received in the Treaty of Guadalupe Hidalgo?

Which was the first territory acquired from Mexico?

What was the main idea of the Monroe Doctrine?

The land that the Treaty of Guadalupe Hidalgo brought into the United States became, between 1850 and 1912, all or part of ten states: California (1850), Nevada (1864), Utah (1896), and Arizona (1912), as well as, depending upon interpretation, the entire state of Texas (1845), which then included part of Kansas (1861); Colorado (1876); Oklahoma (1907); and New Mexico (1912).

The Mexican Cession

The Monroe Doctrine is the best known U.S. policy toward the Western Hemisphere. Buried in a routine annual message delivered to Congress by President James Monroe in December 1823, the doctrine warns European nations that the United States would not tolerate further colonization or puppet monarchs.

Explanation:

studies show tha in 7.5 billion years from now, the expanding sun will engulf, and destroy, the earth.