Not sure how others services work, but Navy recognizes two chains of command- Operational and Administrative. Though the joint chiefs are advisors for operational decisions, they are most certainly in the administrative chain of command. If the command wall pictured above is a non-deploying unit, they will often include the service chief and the chairman of the joint chiefs in their chain of command.
Is that Milley up there? I didn't think he was technically in any chain?
Not sure how others services work, but Navy recognizes two chains of command- Operational and Administrative. Though the joint chiefs are advisors for operational decisions, they are most certainly in the administrative chain of command. If the command wall pictured above is a non-deploying unit, they will often include the service chief and the chairman of the joint chiefs in their chain of command.