The Mexican Rioters in California claim they are fighting to take back THEIR STOLEN land. They claim California is Mexico and it is Stolen Land. That's why they're carrying Mexican flags and burning the American flag.
Guess what? NO!\
The Treaty of Guadalupe Hidalgo, signed on February 2, 1848, officially ended the Mexican-American War (1846–1848). Under its terms, Mexico ceded 55% of its territory to the United States, including present-day California, Nevada, Utah, most of Arizona, New Mexico, Colorado, and parts of Wyoming, Kansas, and Oklahoma.
Mexico also relinquished all claims to Texas and recognized the Rio Grande as its southern boundary.
In exchange, the United States paid Mexico $15,000,000 and agreed to settle claims made by U.S. citizens against Mexico. The treaty was negotiated by Nicholas Trist, a U.S. diplomat, despite being recalled by President James K. Polk. The U.S. Senate ratified the treaty on March 10, 1848, and Mexico ratified it on May 19, 1848.
In 1853 the USA offered Mexico $10,000,000 to make the Gadsen Purchase.
The Gadsden Purchase was an agreement between the United States and Mexico in 1854, in which the United States paid Mexico $10,000,000 for a 29,670 square mile portion of Mexico that later became part of Arizona and New Mexico. The purchase was made to secure a good route for a railroad across the Southwest to California. It is named after James Gadsden, a U.S. businessman who helped bring about the purchase.
This treaty significantly shaped the modern U.S.-Mexico border and had lasting political consequences in both countries
Additional USA land purchases: Louisiana Purchase from the French for $15,000,000, Alaska from the Russians for $7,200,000, and the Panama Canal Zone from Panama for $10,000,000 plus $250,000 yearly. The US paid France $40,000,000 for their failed work on the canal.
All told, the US spent over $350,000,000 just bringing the Panama Canal to Market. The human toll was about 25,000 dead. Many were Americans, but most were West Indians.