Respuesta :
Mexico has been involved in numerous different military conflicts over the years, with most being civil/internal wars.
The United States should have declared war because there were many mixed relationships between the US and Mexico. The us wanted Texas to help complete the idea of Manifest Destiny. Mexico was not fit to govern Texas. Reason 1 the US joined the war because the Mexicans provoked the war by killing Americans. A second reason is Mexico wasn't fit for Texas because Mexicans killed Americans on disputed territory. The Americans were made that blood was being shed on American soil.