California was first settled by Mexicans in the 1790s, however, within two generations, Mexico would be forced out and British settler would mix with the Mexicans. This eventually gave to Britain's most powerful dominion. British settlers mainly landed in Oregon, a place that would once become the Republic of Oregon. However, border disputes between Mexico and Britain were frequently explosive, which resulted in the Anglo-Mexican War of 1846. Although Mexico had a large army, while Britain's forces at first consisted of just irregulars, their supply lines were long and they were stretched thin as they had to fight both Oregon, the Mormon rebels in Utah-Nevada and Texas. The arrival of the regular British army in the summer of 1847, made Mexico's defeat inevitable. As part of the Peace of S