2. Unfulfilled treaty obligations: In 1828, the United States and Mexico had signed the Treaty of Limits, which set the boundary between the two countries and recognized Mexican sovereignty over Texas. The annexation of Texas violated this treaty agreement.
3. Fear of U.S. expansionism: Mexican officials were concerned about the U.S.'s expansionist policies and saw the annexation of Texas as a prelude to further territorial expansion into Mexican territory. This fear was reinforced by the belief that the U.S. wanted to acquire land with access to the Pacific Ocean.
4. Potential loss of control over northern territories: The annexation of Texas weakened Mexico's control over its northern territories and increased the likelihood of incursions by American settlers seeking land and resources.
5. Diplomatic tension: The disagreement about the annexation strained diplomatic relations between Mexico and the United States. President Polk's aggressive rhetoric and actions during the annexation process created diplomatic tension. Mexico even severed diplomatic relations with the United States in 1845 in response to the annexation.
