What is essential to ensure flexibility in developing the situation during contact?

The essential factor to ensure flexibility in developing the situation during contact is the utilization of small, mobile, self-contained forces. This approach allows units to rapidly adapt to changing conditions on the battlefield, respond effectively to emerging threats, and exploit opportunities as they arise. Small, mobile forces can maneuver quickly and operate independently, which is crucial in dynamic engagements where circumstances can shift unexpectedly. This level of mobility and self-sufficiency enhances the unit's ability to maintain situational awareness and react promptly, leading to more effective operational outcomes.

While other aspects such as heavy weapons, communication, and response strategies are certainly important in military operations, they do not inherently provide the same degree of adaptability and responsiveness that small, mobile forces offer. Heavy weapons, for example, can provide fire support but may limit maneuverability. Maintaining communication with command is vital for coordination but does not directly influence the flexibility of forces on the ground. Generalizing a response strategy may lead to delays and inefficiencies when specific, tailored actions are needed to manage unique situations during combat. Thus, focusing on small, mobile, self-contained forces is ultimately the most effective way to ensure flexibility in operational contexts.