A book that details the legion

[qnzkid711]

Im looking for a book that details the legion. Pre Marius and Post. Commands etc.

Thanks

[Legio XX Valeria Victrix]

Try either "The Roman Army at War: 100 BC-200 AD", or "The Complete Roman Army" both by Adrian Goldsworthy. The Complete Roman Army would probably be better, that has pre-Marian troops in it in addition to Late Roman military stuff as well.