I do find Nahar Marshall: MARSHALL NAHAR PRIVATE PRIVATE 3 REG'T WIMBERLY'S GA Militi 132 602 . http://ftp.rootsweb.com/pub/usgenweb/ga/military/warof1812/r...
The following pension of an individual references her husband was in Wimberly's , 3 regt and the soldier was a resident of Jones Co., GA. (Tudor, John Evans - Bounty Land Claim of his widow November 12 1851 Warof1812 3rd Regiment (Wimberly's) Georgia Militia). You can google this.
Another source: http://www.rootsweb.com/~gataylor/regim.htm
3rd Regiment Wimberly's
3 Reg't (Wimberly's) Georgia Militia,
all as privates: Bennet King, Isaac S. King, Jacob King, John King, and John King.
Dempsey Butler is listed as Pvt. in 3rd Regt GA Militia (Wimberly's). Dempsey Butler, b ca 1788, NC He was in Jones Co, Ga in 1827 when he made application in the 1827 GA Land Lottery based on service in the War of 1812. firstname.lastname@example.org
Captain Cyrus White, Wimberlys Regt, Gen Blackshiers Division drafted at Madison, Morgan County, in the fall of 1814, and served about six months. He was released/mustered out at a camp or fort in Georgia, I havent looked that up yet. From a widows pension application. Bobby Hanson email@example.com
Joseph Brooke served in 3 REG'T (Wimberly's) Georgia Militia during the War of 1812. He was stationed in Jasper County, GA. Brown V. Brooke Comanche, TX firstname.lastname@example.org
Captain Lewis Easter
Captain William Harvey
If you can email me tomorrow when I am back home and at my desk, I believe I have a site which tells where the regiments pulled from.