[1] This position is not to be confused with Captain General Royal Marines, the ceremonial head.

[8] Lieutenant General Robert Magowan was the first person to assume the role twice, serving between 2016 and 2017 and again from 2021 to 2022.

[11][12] The appointment had been held concurrently with that of Commander United Kingdom Amphibious Forces (COMUKAMPHIBFOR) since the creation of the Fleet Battle Staff in 2001.

[13] In April 2018, it was announced that the two separate deployable two-star maritime operational commanders (COMUKMARFOR and COMUKAMPHIBFOR) would be merged into a single, larger, maritime battle staff.

[14] In April 2021, the role passed to a more senior officer in a dual-hatted capacity, and the commandant general's role, as well as being the professional head of the Royal Marines, was identified as championing emerging concepts in amphibious warfare and maintaining critical ties with the US Marine Corps.