What immediate action must be taken if a patrol comes under fire from a far ambush?

When a patrol comes under fire from a far ambush, the most appropriate immediate action is to return fire and take the best available positions. This approach allows the patrol to engage the threat effectively while also seeking cover to mitigate their exposure and vulnerability. By returning fire, the patrol can suppress the ambushers and potentially create an opportunity to maneuver or communicate more effectively.

Taking the best available positions is also crucial as it facilitates a better defensive posture. This may involve moving to locations that offer cover and concealment, thereby minimizing the risk of casualties while responding to the ambush. In a combat scenario, remaining passive or immediately retreating could leave the patrol vulnerably exposed, allowing the enemy to capitalize on their position and potentially inflict greater harm.

In contrast, options such as requesting air support might take too long to execute in an immediate firefight situation. Preparing for a hasty retreat could lead to chaos and disorganization, possibly exacerbating the situation. Retreating immediately without any return fire could allow the ambushers to take control of the engagement and inflict severe damage on the retreating personnel. Therefore, actively engaging the threat and positioning defensively is the most effective response.