Most of the impressment of blacks was done by the Confederate government. The Confederate Impressment Act of March 26, 1863, provided that no farm slave should be impressed before December 1. On February 17, 1864, free negroes were made liable to service in the army as laborers and teamsters. Before the passage of this act free negroes had often been hired as substitutes, and sent to the army as soldiers in place of those who preferred the comforts of home.[574] Bishop-General Polk made a general impressment of negroes in north Alabama to work on the defences in his department, and many protests were made by the owners. A public meeting was held in April, 1864, in Talladega County to protest against further impressment of negroes. This county, in December, 1862, sent 90 negroes to the fortifications; in January, 1863, 120 more were sent; in February, 1863, 160; in March, 1863, 160; and so on. Talladega was one of the counties that had to furnish supplies to the destitute mountain counties, and the loss of labor was severely felt. Randolph and other north Alabama counties made similar protests. From north Alabama 2500 negroes were taken at one time to work on the fortifications in the Tennessee valley; this frequently occurred. Central and south Alabama and southeast Mississippi furnished many negroes to work on the fortifications at Selma, Montgomery, and Mobile. After Farragut passed the forts at Mobile, 4500 negroes were at once set to throwing up earthworks and soon had the city in safety.[575] The lines of earthworks then made by the negroes still stretch for miles around the city, through the pine woods, almost as well defined as when thrown up.