What were the causes and consequences of the Mexican American War? (Long answer pls)

CAUSES

A border dispute over whether Texas ended at the Nueces River (Mexican claim) of the Rio Grande (U.S. claim)

An attack on American troops by Mexican soldiers in the disputed area between the two rivers on April 25, 1846.

The Unites States annexation of Texas in 1845

Outcomes :

General Zachary Taylor, a hero of the war, used his newfound notoriety to become the twelfth president of the U.S.

Mexico ceded to the United States nearly all of the territory now included in the states of New Mexico, Utah, Nevada, Arizona, California, Texas, and western Colorado in exchange for $15 million

The reopening of the slavery-extension issue, which had been largely dominant since the Missouri Compromise of 1820, and a corresponding rise in sectional antagonism in the U.S.

What did the U.S. gain by winning the Mexican-American War?

Under the Treaty of Guadalupe Hidalgo, which settled the Mexican-American War, 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. Mexico ceded nearly all the territory now included in the U.S. states of New Mexico, Utah, Nevada, Arizona, California, Texas, and western Colorado for $15 million and U.S. assumption of its citizens’ claims against Mexico.

ok so u have2 basically

in his book, the riddle of the rosetta stone, james giblin talks about how there was a young british polymath and physician named thomas young who made a lot of advances on the deciphering of the rosetta stone. he says that even though young made a lot of mistakes because he was working under false assumptions, he also made huge contributions like deciphering three out of the seven symbols (more than anyone else before him). young published his findings and continued his good work but he wasn't able to progress much further due to some unfavorable situations, he still laid the basis for many other scholars and of course for the man who has been generally known to have deciphered it, jean-françois champollion