What did United states gain from Mexican American war?

Answer 1

The US acquired the whole states of California, Nevada, Utah, Arizona, New Mexico and Texas, as well as parts of Wyoming, Colorado, Oklahoma and Kansas which in present-day terms amount for more that 50% of the US economy.

Answer 2

The United States acquired the whole states of California, Nevada, and Utah, as well as northern Arizona and New Mexico, through the Mexican-American War. The treaty to end the war also stated that Mexico had to cease any attempt on reclaiming Texas, which also included parts of Wyoming, Colorado, Oklahoma and Kansas. The land acquired through the Mexican Cession in some ways was a cause of the Civil War, because it made it necessary to decide whether or not to extend slavery into the new territories. Today, this land is extremely important to the United States. For example, California: it were its own country, it would be the 8th largest economy in the world. Seven of the top ten wealthiest cities in the United States are located in California. Nevada is one of the largest sources of gold in the world, and a major industry. Wyoming is the number one producer of coal in the United States, and second nationwide for natural gas production. Without such present-day states, the US wouldn't be the superpower it is now: all of them contribute with almost one-third of the American economy.