In the 15th issue of the digital Islamic State magazine "Dabiq
," ISIS explains its ideology in recent terror attacks and promises more attacks against Westerners before the 16th issue is released. There appears to be no timetable for the magazine's publication, however. The last issue was released on April 13 and before that, January 19. The latest issue, titled "Break the Cross," begins with this article, explaining ISIS' reasoning for recent terrorism and its call for others to join "the religion of pure monotheism, truth, mercy, justice, and the sword."