This report presents the unique conditions and resultant military requirements for conducting conventional large-scale operations in the Scandinavian High North. By using three derived heuristics, a set of distinct military units from five Western states was then assessed for their ability to operate effectively in that environment. The report is based on an open-source literature review that has collated material primarily regarding patterns of military exercises in the region in the last five years. The conclusions feature a list of Western military units that are assessed as capable of operating in the High North. These units are primarily Norwegian, Finnish, and American.