Which of the following is NOT a role of engineers in enabling mobility and counter-mobility in a combat operation?

• A. Create Mobility Corridors
• B. Breach Obstacles
• C. Construct Fortifications
• D. Disrupt Enemy Air Defense Networks

Answer: (D)

Engineers in combat support focus on shaping how forces move and how the enemy is prevented from moving. They enable mobility by clearing routes, removing obstacles, and building access like bridges or bypass channels, which create mobility corridors that let maneuver occur smoothly. They also perform breaching tasks to defeat or bypass barriers—minefields, fences, or fortified obstacles—to open lanes for the advance. For countermobility, they design and construct obstacles and fortified positions that slow or channel the enemy and protect friendly forces, which includes building fortifications as part of shaping the battlefield to hinder adversaries.

Disrupting enemy air defense networks isn’t typically within the engineer’s toolkit. That mission involves electronic warfare, air defense suppression, and other dedicated fires assets that target and degrade enemy air defenses. So, the option describing disruption of enemy air defense networks is not a standard engineer role in enabling mobility and countermobility.