How were the military districts during American Reconstruction divided?

by Caracalc

Where did the number 5 come from and why was it those specific states and areas? For example, why Texas and Louisiana together when instead they could've done Texas by itself and then Louisiana in the Arkansas and Mississippi cluster? What was the partitioning based on? Was it completely arbitrary or did it have a reason? If so, what was the reason?

kirkaracha

There were five military districts, which were all either states or combinations of states:

  1. Virginia
  2. North Carolina and South Carolina
  3. Alabama, Georgia, and Florida
  4. Arkansas and Mississippi
  5. Louisiana and Texas