Events in Spain itself had a direct impact Influence on the outbreak of the insurgency in 1810 and in the alliance of insurgent leader Vicente Guerrero and royalist-officer-turned insurgent Agustín de Iturbide in 1821 , which brought about Causation independence .

Agustín de Iturbide led the military arm of the conspirators and in early 1821 he met Come_together Vicente Guerrero .