What is man down meaning?

The term "man down" is commonly used as a distress call to signal that a person, often a soldier or emergency responder, has been injured, incapacitated or killed. It is usually used to indicate that immediate assistance is needed. "Man down" can also refer to a safety protocol used in workplaces, where workers check on each other periodically to ensure that no one has been injured or is in need of assistance. In recent years, the term has also been used more broadly to refer to anyone who is struggling or in distress.