Changes

*a A [[Lord Commander of the Imperial Navy]] has jurisdiction over the Imperial Navy in a [[Segmentum]] of the Imperium.{{Fn|2}}

*a A [[Lord Commander (Imperial Guard)|Lord Commander]] a strategic rank of the [[Imperial Guard]] subordinate only to the [[Lord Commander Militant]].

*a A [[Lord Commander of the Expedition Fleet]], a position in the [[Imperial Army]] during the [[Great Crusade]].

*a A [[Legion Master]], sometimes named '''''Lord Commander''''' was a title indicating the command of a [[Space Marine Legion|Legion]], before the [[Primarch]]s were rediscovered.{{Fn|5}}*a A [[Lord Commander (Legiones Astartes)|Lord Commander]] became the title given to the [[Praetor (Rank)|Praetors]] in charge of a [[Space_Marine_Legion#Strategic_Disposition_of_a_Space_Marine_Legion|Chapter]] during the [[Great Crusade]].{{Fn|4}}