I am currently a Visiting Fellow in the archaeology department at Newcastle University. Placed as it is at the eastern end of Hadrian's Wall, this is a great place to study ancient history and/or archaeology, so I thought that I would post a couple of links to some of the postgraduate courses they offer:-

First in Greek and Roman archaeology - https://www.ncl.ac.uk/postgraduate/courses/degrees/archaeology-ma/#modules

The University also has a course on Roman Frontier Studies, something not offered in many places - https://www.ncl.ac.uk/postgraduate/courses/degrees/archaeology-ma/#modules

Philip Matyszak, who writes on a wide range of themes from Greek and Roman history, varying from biographies, studies of campaigns and themes, to the lighter time travellers' guides to ancient Rome and Athens, or the 'Unofficial' textbooks on being a legionary or a gladiator. Some of the latter are terrific gifts for friends you want to introduce to the classical world as they are easy to read, often funny, but filled with detailed information.
http://www.matyszakbooks.com/index.html

Ian Hughes, who has written books on Belisarius, Stilicho and Aetius, and has another coming out that covers Valentinian and Valens. All take a fresh look not just at the military side of things, but at the political and social contexts of these campaigns.
http://www.ianhughesma.com/

Gareth Glover, who works tirelessly to discover, edit, and put into print records and especially personal accounts of the period. All have something new in them, while his series The Waterloo archive currently running to four volumes is jam-packed with surprises even for anyone who has read a lot about the campaign.
http://www.garethglovercollection.com/

Ian Knight, who will already be well known to anyone with an interest in the colonial campaigns of the late nineteenth century and especially the Zulu War of 1879. Once again, he is someone able to find fresh insights in a period thought to be well known. His book, Zulu Rising, is the best account of the causes of the Zulu war and the Isandlwana and Rorke's Drift campaign, and in his other works you will find a lot about the rest of the conflict. For ancient historians, the Victorian era often provides interesting parallels for the Roman frontier experience.
https://www.ianknightzulu.com/