Use a text editor to edit the 'export_descr_unit' file in the 'activisionrome - total wardata' folder. Note: This procedure involves editing a game file create a backup copy of the file before proceeding. Once edited, you can copy and paste that line up to twenty times to create that number of units in that army.
In this section there is a line that starts with the word 'unit' that allows values relating to experience (0-9), armor rating (0-3), weapon level (0-3) to be changed. Scroll down to find the faction to change. Use a text editor to edit the 'descr_strat' file in the 'activisionrome - total wardataworldmapscampaigni mperial_campaign' folder.