Complex sentence: Via Dictionary.com The cadre may be the permanent skeleton establishment of a unit, around which the full unit can be built if needed, or in countries which have conscription, the permanent staff of a regiment who train the conscripts assigned to it.
Split into simpler sentences: Via Dictionary.com The cadre may be the permanent skeleton establishment of a unit, around which the full unit can be built if needed. In countries which have conscription, a cadre may comprise the permanent staff of a regiment who train the conscripts assigned to it.