the best summary of dbm that i have found was written by ed allen at the
stanford dbm site
what is dbm?
dbm is a set of rules for using miniature figures representing the soldiers to refight battles from ancient times.
the ruleset and the army list books provide all the details you need to play exciting games from biblical
times through to 1500 ad. they are widely available. for example from
eureka miniatures
dba fanaticus -
dba fanaticus is simply the best single resource on the net for dba, dbm's little brother. you can also play dba online here.
what is dbm?
