Ali Fisher and I have recently exchanged thoughts and data regarding the increasing Jihadi use of Twitter. By taking an interdisciplinary approach of social-media analysis and cluster network assessment, we decided to start a series on Jihadica on the parts of the overall jihadi, primarily Arabic language propaganda resonating among the audiences online. We plan on delivering updates on the subject as we move along and kick-off the series with an overall introduction to the theme. In future posts in the series, we will highlight and decipher some of the core content most often shared on Twitter, allowing conclusions to be drawn about the parts of jihadist propaganda which resonate with a wider audience (and hence shared over and over again). Introducing the theme The recent essay by Abu Sa‘d al-‘Amili on the state of global online jihad (discussed here) lamented a general decline in participation in jihadi online forums.