Mexican Navy From that year until 1939 it existed jointly with the Mexican Army in the organic ministry. Since its declaration of independence from Spain in September 1810, through the mid decades of the 19th century, Mexico found itself in a constant state of war, mostly against Spain which had not recognized its independence. Therefore, its priority was to purchase its first fleet from the U.S. in order to displace the last remaining Spanish forces from its coasts. The Mexican Navy has participated in many naval battles to protect and defend Mexico's interests. Some of the most important battles were: The first
Mexican–American War could not be released from its obligations. The US was released from all obligations of Article XI five years later by Article II of the Gadsden Purchase of 1853. The 1848 Treaty of Guadalupe Hidalgo ended the war and enforced the Mexican Cession of the northern territories of Alta California and Santa Fe de Nuevo México to the United States. Mexico acknowledged the loss of what became the State of Texas and accepted the Rio Grande as its northern border with the U.S. The losses amounted to one-third of its original territory from its 1821 independence. Before the secession of