Which aspect relates directly to sustaining offensive operations?

The aspect that relates directly to sustaining offensive operations is logistical engineering. Logistical engineering encompasses the planning and execution of logistics that support and supply military operations, ensuring that necessary resources—such as ammunition, fuel, food, and equipment—are available to troops engaged in offensive actions. Keeping combat units supplied and operationally effective is crucial for sustaining their efforts in the field.

Field engineering focuses on constructing and maintaining military facilities and infrastructure but does not directly cover the support aspects needed for sustained operations. Combat engineering involves tasks specific to battlefield mobility and survivability, such as breaching obstacles or constructing fortifications, which are essential during operations but not necessarily involved in their sustainability over time. Counter-mobility primarily concerns delaying or disrupting enemy movement, which is critical in operations but does not provide the resources and support needed for sustaining offensive maneuvers. Thus, logistical engineering is the cornerstone for maintaining an effective and prolonged offensive capability.