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   -entered the presidency on May 1, 1917 until May 21, 1920 -entered the presidency on May 1, 1917 until May 21, 1920
 -Introduced military education in official schools
 -put into practice state and municipal sovereignty.
 -helped with his irregular forces to fight the Orozquista rebellion
 -convened the Constituent Congress that drafted the most advanced Political Constitution of its time
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   -renew the executive and legislative power. -renew the executive and legislative power.
 -generated the first amnesty law
 -renegotiated the payment of the external debt
 -activated an agrarian reform program that benefited 128 villages
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   -Obregón consolidated the alliances of the State with the popular, peasant and worker organizations -Obregón consolidated the alliances of the State with the popular, peasant and worker organizations
 -promoted the most advanced and progressive ideals of the 1917 Constitution
 -applied the Law that established the distribution of land among the peasants who made the Revolution of 1910
 -He promoted rural education, secondary education, technical education and industrial and commercial education.
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   -He founded the National Banking Commission and the Bank of Mexico. -He founded the National Banking Commission and the Bank of Mexico.
 -created the law of the Calles
 -He forced the high officers to revalidate their degree
 -Restructured the School of Chapingo and the School of Veterinary Medicine
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   -favored the division of the land -favored the division of the land
 -distributed about 2 million hectares that benefited many peasants
 -strengthened peasant organizations
 -was interim president
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   -the National Tourism Commission was founded -the National Tourism Commission was founded
 - the Federal Labor Law was enacted
 -Mexico entered the League of Nations.
 -the president was the victim of an attack and had to resign
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   -enacted the Agricultural Credit Law -enacted the Agricultural Credit Law
 -He enacted the anti-electoral reform to the Constitution.
 -Created the National Bank of Public Works and Services
 -set the minimum wage