The Cristeros Movement was a reaction to the severely anti-clerical Constitution of 1917. According to the website www.traditioninaction.org, Cristeros of Jalisco recited this prayer at the end of the Rosary.
My Jesus Mercy! My sins are more numerous than the drops of blood that Thou did shed for me. I do not deserve to belong to the army that defends the rights of Thy Church and that fights for her. I desire never to sin again so that my life might be an offering pleasing to Thy eyes. Wash away my iniquities and cleanse me of my sins. By Thy Holy Cross, by my Holy Mother of Guadalupe, pardon me.
Since I do not know how to make penance for my sins, I desire to receive death as a chastisement merited by them. I do not wish to fight, live or die except for Thee and for Thy Church. Blessed Mother of Guadalupe, be at my side in the agony of this poor sinner. Grant that my last shout on earth and my first canticle in Heaven should be Viva Cristo Rey! Amen.
