 Pope Pius XI also published the encyclical "Firmissimam constantiam" on March 28, 1937, expressing his opposition to the "impious and corruptive school" (paragraph 22) and his support for Catholic Action in Mexico.That was the third and last encyclical published by Pius XI that referred to the religious situation in Mexico.Many of those who had associated with the Cristeros took up arms again as independent rebels and were followed by some other Catholics, but unarmed public school teachers were now among the main targets of independent atrocities association with the rebels.