Here is a reference, being attributed to an officer in the 17th TX Infantry during the spring of 1863.

In contrast to his happy report of the welcome the Confederate soldiers received along their line of march, Captain Petty complained of Federal troops in the vicinity of the Mississippi who "having failed to take Vicksburg and Port Hudson have become mad and now going out into the country bordering that stream and are destroying everything particularly crops, provisions and farming utensils; burning residences, gins, etc.; stealing negroes and every thing they can lay their infernal hands on." No doubt Captain Petty echoed the sentiments of many of those in Walker's division when he declared he hoped the "Black Flag" (signifying "no quarter") would be raised and he would "get to fight under it."