You can increase the tank manufacturing/production capacity in several ways, including:

- Upgrading the assembly plants in your base and building more of them. These plants help accelerate tank manufacturing processes and increase the number of units produced.
- Adjusting some permanent skills of military officers, such as the lone wolf officer, to increase unit production capacity.
- Learning commander skills "Training troops I and Training troops II".
- Increasing the honor level in your base.
- Unlocking and upgrading the attributes of some support officers, such as the officer Colonel Monka