To add a skill slot to a soldier follow these steps:
- If there is an action that can be taken on a soldier, a small red badge will appear on the corner of MY TEAM button on the home screen. If you see a red badge, tap the MY TEAM button.
- Once in the MY TEAM screen, tap on a soldier with a red badge over his soldier card.
- Once on the manage soldier screen, if a skill slot can be added to a soldier, a blank skill slot badge will appear. If you see one, tap it.
- The game will now show you the available add skill slot cards that can be applied on that soldier. You can now apply the skill.
- Once the skill slot is applied you will see its symbol replace the blank icon on the soldier card.
- The skill slot is now ready to have a Skill Perk applied to upgrade the skill.