Complex sentence: In wartime, the army corps became a mobile tactical formation and four (Higher Cavalry Commands) were formed from the Cavalry Inspectorate, the equivalent of corps, being made up of two divisions of cavalry.
Split into simpler sentences: In wartime, the army corps became a mobile tactical formation. Additionally four Higher Cavalry Commands were formed from the Cavalry Inspectorate, these were the equivalent of corps, each being made up of two divisions of cavalry.