The purpose of this analysis is to describe the threat from solo terrorism and lone wolf terrorism against the West, including against Denmark. Attacks carried out by individuals is no new phenomenon, however, it is noteworthy that in the past two years, several attacks or attempts at attack in Western countries like the United States, Great Britain and Denmark have been committed by individual persons. The analysis seeks to clarify whether this is an increasing trend. Likewise, this analysis shall describe the factors characterising solo terrorism, including examining the focuses of al-Qaida and AQAP on this area.