In every case-- in your references-- it was the Confederate authorities that were making the requisition for State militia....not authorities of the State. In other words, the militia requisitioned was being placed on active duty for service under Confederate leadership. A mayor or the State Governor did not usually have to requisition the militia to use them- they already had control over them by State law. When Lewis made his statement in committee he did not make that clear...he most probably meant Confederate requisition for active service, since the State does not require requisitioning its own militia- as per the Military Law of Louisiana, Jan. 1862.
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David Upton