Your task in Line Control is to capture territories, and to do this you need to first capture the watchtowers. This is where enemy garrisons can be located. If the tower is gray, its garrison is neutral and can be easily subjugated, and its warriors can be added to your army. During the capture, accumulate your fighters there to attack the next tower. Smart tactics and strategy, as well as superior numbers, win. To complete a level, you need to capture all the towers in the territory in Line Control.