History of Hispanic and Latino Americans in the United States
In 1821, Mexico gained independence from Spain, annexing the southwest of the present United States, including Arizona. As missions began to wither, Mexico began auctioning off more land, causing the Pimería Alta and the Apachería to shrink as territory expanded. In the meantime, American mountain men began to enter the region, looking to trap beavers for their pelts. In 1836, Texas declared independence from Mexico and claimed much of the territory in the northern lands of Mexico. When the United States annexed Texas in 1846 over the strong objections of the Mexican government, U.S. troops moved into disputed territory. The hostilities erupted in the Mexican–American War (1846–1848). The U.S. occupied Mexico City and forced the newly founded Mexican Republic to give up its northern half, including the later Arizona.
Japan–Mexico relations
In 1874 (fifty-three years after Mexico declared independence from Spain in 1821), a Mexican scientific delegation headed by Francisco Díaz Covarrubias arrived in Japan to witness the transit of the planet Venus through a solar disc. Although the scientific delegation did not have much success, this mission did allow for formal diplomatic relations to begin between the two nations. In 1888 Foreign Ministers Matías Romero and Munemitsu Mutsu signed a Treaty of Amity, Commerce, and Navigation; which was to be Japan's first "equal" treaty with a foreign nation and thus formally established diplomatic relations between the two nations.