What Caused The Mexican American War From 1846 To 1860

The Mexican-American War of 1846 marked the first U.S. armed conflict chiefly fought on foreign soil. The war was caused by conflict between the U.S. and Mexico from 1846-1848. Texas initially gained independence on mexico, the U.S. declined to incorporate into the union, because the northern political interest were against the new slave state. Mexico threatened that any attempts at annexation would lead to the war. The war began and U.S. started out by killing 12 people. On February 2, 1848, the Treaty of Guadalupe Hidalgo was signed. Under the Treaty, Mexico recognized the U.S. annexation of texas, and they agreed to sell california for $15 million plus certain damages caused during the war. Caused tensions because the U.S. had to decide