After centuries of Spanish rule, Mexico finally gained recognition as an independent nation when the Santa María-Calatrava Treaty was signed on December 28, 1836. This milestone marked the culmination of Mexico's arduous struggle for independence, sparked by the 1810 Grito de Dolores. The treaty not only solidified Mexico's freedom but also established boundaries, trade agreements, and diplomatic relations between the newly recognized nation and its former colonial power, Spain. This monumental event paved the way for Mexico's growth and development, shaping the course of its history.