In the Tuesday, March 22, 1864 edition (page 1, column 1, Vol. 6, No. 36) of the "Shreveport News" (as well as the Tuesday, March 29, 1864 edition - Page 1, column 2-3)it has an notice from - "Headquarters, Louisiana State Army, Executive Office, Shreveport" dated March 15, 1864 and signed by Henry W. Allen, Governor and Commander in Chief of Louisiana.
"It is a plea to all persons to stand ready, with their own firearms, at a moment's notice to aid in the defence of the state against the approaching enemy."
Also, in the same March 22, 1864 edition (except Page 1, Column 2), with the same heading above (and the additional name of T.G. Hunt, Adjutant General), Allen writes, "Officers of Caddo, DeSoto, and Claiborne are ordered to bring ther men, adequately equipped at their own expense, to Shreveport at once."
The last order refers to the "Reserve Corps", which was basically a by-parish militia force. The first order is similar to the order that brought clerks and civilians into service to protect Richmond just prior to its abandonment by the Confederacy in April of 1865. It specifically covers every able-bodied person in the area.
If the furloughed or discharged men were not already enrolled in a parish militia regiment, the first order would definitely instruct them to report for duty. As an example, one of the men , Private Valcour Adley, of the 19th Louisiana Infantry (in Company I, the Keatchie Warriors from Caddo Parish)had been home on sick furlough. He answered Allen's call to fall in the ranks of the Army and ended up being killed at Mansfield. Mansfield State Historic Site has collected more examples of men who had been discharged or furloughed and fought there.