О контексте командования см.: Van Creveld (1985), pp. 17–57. О доступности карт и другой географической информации в римском мире см.: A.Bertrand, "Stumbling through Gaul: Maps, Intelligence, and Caesar's Bellum Gallicum", The Ancient History Bulletin 11.4 (1997), 107–122, C. Nicolet, Space, geography and politics in the early Roman empire (1991), и В. Isaac, "Eusebius and the geography of Roman provinces", in D. Kennedy (ed.), The Roman Army in the east. Journal of Roman Archaeology Supplementary Series 18 (1996), pp. 153–167.