What is it called when they acknowledge a service man has died?

When a service member has died, the acknowledgment is often referred to as a "military honors ceremony" or "funeral honors." In the United States, this may involve a formal ceremony that includes the presentation of the American flag, the playing of "Taps," and other honors to recognize the individual's service and sacrifice. In some contexts, it may also be called a "memorial service" or "commemoration."