Which rank could lead a commando unit or serve as a Deputy Commander of 3 Commando Brigade?

The rank that could lead a commando unit or serve as a Deputy Commander of 3 Commando Brigade is Colonel. This rank typically carries the level of responsibility and leadership required for these positions within the Royal Marines structure. A Colonel is expected to have significant experience and expertise, as they oversee the strategic direction and operational effectiveness of a unit. They play a crucial role in planning and executing missions and ensuring that the unit functions cohesively.

In the context of the Royal Marines, the role of the Deputy Commander of 3 Commando Brigade also falls within the scope of a Colonel's duties, ensuring that the command structure is robust and effective at higher levels of operation. This senior rank allows for oversight across multiple units, thus ensuring that the Brigade can respond effectively to a variety of operational challenges.

Other ranks, while holding important positions, do not typically possess the same level of authority or breadth of responsibility required to lead a commando unit or serve in such senior command roles.