Getting a copy of DBA and an army list for Greek armies

pat1958 has given details of the physical rule book which includes the full army lists. This is only available in hard copy.

If you want an electronic version, Sue Laflin-Barker's "Start Ancient Wargaming using DBA 3.0" is available on Kindle. It includes the rules but not the illustrative diagrams. It also contains a selection of the army lists, probably Greek, almost certainly one of the Roman armies, but, from memory, not Aztec.

Of the two, I would recommend the hard copy, but if you want an e-version, then Sue's book can be found here: www.amazon.co.uk/Sue-Laflin-Barkers-Start-Ancient-Wargaming-ebook/dp/B00UVXDQXE/ref=sr_1_3?dchild=1&keywords=sue+laflin-barker&qid=1590735829&sr=8-3