Complex sentence: He stated that the unit's name stemmed from the custom that every killed, seriously wounded, or sick member was immediately replaced with a new one, maintaining the corps as a cohesive entity with a constant strength.
Split into simpler sentences: He stated that the unit's name stemmed from the custom that every killed, seriously wounded, or sick member was immediately replaced with a new one. This maintained the corps as a cohesive entity with a constant strength.