What was one of Álvaro Obregón's major achievements as President of Mexico?

Álvaro Obregón's presidency is noted for significant reforms, particularly in the area of education. His administration implemented measures aimed at improving literacy rates and expanding access to education across Mexico. This was part of a broader effort to promote social development following the turmoil of the Mexican Revolution. The focus on education reform helped to lay the groundwork for a more educated populace, which was essential for Mexico's modernization efforts in the years to come.

In contrast, land nationalization, while an important aspect of the broader revolutionary agenda, was more prominently associated with the earlier phases of the revolution and figures like President Lázaro Cárdenas. The restoration of monarchy is not relevant in this context, as Mexico was firmly established as a republic following the revolution. Lastly, while Obregón did have military experience and his presidency involved military elements, the primary legacy he left revolves around educational reforms that aimed to enhance and reshape Mexican society.