 Meanwhile, rebels in Jalisco, particularly the region northeast of Guadalajara, quietly began assembling forces.Led by 27-year-old René Capistrán Garza, the leader of the Mexican Association of Catholic Youth, the region would become the main focal point of the rebellion.The formal rebellion began on January 1, 1927 with a manifesto sent by Garza, "A la Nación" ("To the Nation").