Where can you find operational details incident to graves registration procedures?

The correct answer, Marine Corps Publication FMFM 4-8, is specific to the operational details regarding graves registration procedures. This publication outlines the responsibilities and procedures for handling casualties in a military context, including the treatment of remains and the associated tasks necessary for proper registration and burial. It serves as a critical resource for Marines involved in operational planning related to casualties, ensuring that they follow established protocols.

While other publications may touch on aspects of casualty operations or general policies, FMFM 4-8 focuses directly on the processes and procedures relevant to graves registration, making it the most suitable reference for this specific topic.