Randy,

Fold3 lists Alsey B. Robertson as Captain of Company B, Saint Tammany Regiment, Louisiana Militia.

Elected or Appointed 8 August 1861
Accepted 13 August 1861
Commission Issued 13 August 1861
To Rank From 8 August 1861
Commission Expires 13 August 1866(!)

My records show the Saint Tammany Regiment to be commanded by Col. George H. Penn and to have been part of the 1st Brigade, 3rd Division of the Louisiana Militia until the re-organisation in February 1862 when it became part of the 7th Brigade, Louisiana Militia.