What is the purpose of the 'turn' effect of tactical obstacles?

The 'turn' effect of tactical obstacles is primarily designed to manipulate enemy maneuver direction. When obstacles are placed strategically on the battlefield, they can force enemy units to change their intended path or approach. This redirection can create vulnerabilities for the enemy by leading them into unfavorable positions or zones where they can be effectively engaged by friendly forces. By influencing the enemy’s movement, the friendly forces can better control the terrain and dictate the flow of the battle, enhancing their combat effectiveness.

Other options may have relevance in certain contexts, such as slowing down enemy units or providing cover for friendly forces, but the specific purpose of the 'turn' effect focuses on altering the direction of enemy maneuvers, which is critical for tactical advantage.