Yes, the supported corps or division staff would have to plan & synchronize the operations of one or the other type battalions. Span of control, 3-5 subordinate units. If the Division is trying to plan and C2 3-5 BCTs, plus 3-5 FA BNs, plus 3-5 ADA BNs, plus whatever else, something would lose out- probably the detail required by a BN and/or the synchronization of ensuring the BNs are working together.
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