Troop Capacity
By default, each Hero March has six (6) Tower-Defense Units under the Lead Hero's command.
Troop Capacity can be increased by four (4) via Academy Tech, and the maximum Troop Capacity in Normal Land is ten (10).
Troop Capacity can be increased by nine (9) via War Tech, and the maximum Troop Capacity in Broken Land is nine-teen (19).