Santa María–Calatrava Treaty

[1][2] The war ended in 1821, with the signing of the Treaty of Cordoba on August 24 and the Declaration of Independence of the Mexican Empire on September 28 of that year.

This act was the result of the negotiations of the different factions participating in the war, including Juan O'Donojú, the last viceroy of New Spain on behalf of the monarchy.

He had ascended to the throne shortly before the wars for the independence of the American colonies began, leaving Spain in a terrible economic situation.

He was succeeded by his daughter Isabella II, who was then a minor, so her mother Maria Cristina assumed the regency of the country, coinciding with the start of the First Carlist War due to the conflict of succession with Carlos María Isidro de Borbón, brother of Ferdinand VII.

This would be reflected, also, in a more open position regarding relations with the American countries to motivate trade and reactivate the damaged Spanish economy.