US War With Mexico (Pre-Civil War)
War with Mexico: Mexico controlled much territory in North America; Americans desired these lands The United States at War: Mexican government would not recognize he annexation of Texas Polk ordered General Zachary Taylor to cross the Texan border and occupy the Mexican city of Matamoras. Polk wished to acquire New Mexico and California; he ordered John C Fremont to lead an expedition to map US rivers. Bear Flag Rebellion - Fremont?s armed struggle with the Mexican government in California Polk determined to start war with Mexico to seize more land; he assembled troops in Texas and claimed that Mexicans had invaded our territory and shed American blood on American territory Whigs opposed the war, but supported it with supplies South and West were enthusiastic for it