Do you think you may have a relative that fought in the War of 1812? The following organizations may be able to help you with your research:

Barney Family Historical Association

General Society of the War of 1812
Maryland Chapter: Society of the War of 1812 in Maryland 

Greenmount Cemetery (download a PDF of War of 1812 veterans and related individuals interred there)

Fort McHenry's database -Defenders of Maryland in the War of 1812

Maryland Historical Society

Maryland State Archives

The National Archives

National Society of the United States Daughters of 1812
Maryland Chapter: Maryland State Society of the United States Daughters of 1812