What is the first step a combat lifesaver should take upon encountering a casualty?

The first step a combat lifesaver should take upon encountering a casualty is to assess the situation for safety. This step is essential because ensuring the safety of both the lifesaver and the casualty is critical in a combat environment. If the area is unsafe, the lifesaver may become another casualty, which would hinder the care being provided. By conducting a thorough assessment of the surroundings for any potential threats or hazards, the combat lifesaver can make an informed decision about how to proceed safely. This initial evaluation helps to establish a secure environment where effective first aid can be administered without further risk to the lifesaver or the casualty.