This type of alarm can cause everyone to drop to the ground and fire on anyone left standing. Your plan must allow for some personnel, weapons, and equipment to be out on mission. Ensure you have coordinated with the bases near you. Soldiers with fighting positions oriented near or toward other bases must use caution when firing weapons. Ensure it is understood and confirmed from which direction the BSA's reactionary force will come.
Static security is hard to detect and, therefore, effective.
Mobile patrolling is an immediate deterrent for many small elements. In addition to the MP platoon, have a reactionary team identified and rehearsed to combat an enemy attack. Use any available engineer assets to dig in equipment and prepare fighting positions.