I've just published an updated version of the Medieval army lists for To the Strongest! The 211-page PDF now includes 120 army lists, including five new lists (West Slav, Old Prussian, Early Lithuanian and Samogitian, Later Feudal English, and Yi Korean lists). I've also moved the Later Hindu Indian, Early Lombard and Avar lists here, from the Ancient List eBook, as they sit better alongside the medieval lists. Several of the existing lists have been revised, and a good deal of background information has been added.
Each list consists of a spreadsheet describing the army. Most of the lists also include a historical background to the army and details of how it fought and, and sometimes, a picture of finely painted miniatures.
Should you order the lists, you'll receive updates roughly every three months until the end of 2022, with new lists and additional material added each time. The next update will be at the end of May. The eBook costs £9.99 GBP. You can buy the army lists here.
Alternatively, if you are outside the U.K. (especially if you are in the E.U.), you might like to buy them from Wargame Vault for $14.99 USD.