Headquarters/Headquarters Troop/278th ACR, Knoxville, Knox County
hq278acr@tn.ngb.army.mil

190th Engineer Company (-), Morristown, Hamblen County
Detachment 1, 190th Engineer Company, Monteagle, Grundy County
278th Chemical Company , Oak Ridge, Anderson County
278th Air Defense Artillery Battery ACR, Clarksville, Montgomery County
Detachment 1, 278th Air Defense Artillery Battery, Nashville, Davidson County
278th Military Intelligence Company (-) ACR, Nashville, Davidson County
Detachment 1, 278th MI Company ACR, Jackson, Madison County

Headquarters/Headquarters Troop/1st Squadron/278th ACR, Athens, McMinn County
hq1278@tn.ngb.army.mil

Troop A/1/278 ACR, Cleveland, Bradley
Troop B/1/278 ACR (-), Sweetwater, Monroe County
Detachment 1, Troop B/1/278 ACR, Harriman, Roane County
Troop C/1/278 ACR (-), Rockwood, Roane County
Detachment 1, Troop C/1/278 ACR, Crossville, Cumberland County
Company D/1/278 ACR, Lenoir City, Loudon County
HOW Battery (-)/1/278 ACR, Maryville, Blount County
Detachment 1, HOW Battery/1/278 ACR, Dayton, Rhea County

Headquarters/Headquarters Troop (-)/2nd Squadron/278th ACR, Kingsport, Sullivan County
hq2278@tn.ngb.army.mil

Detachment 1, HHT/2/278 ACR, Rogersville, Hawkins County
Troop E/2/278 ACR, Newport, Cocke County
Troop F/2/278 ACR, Bristol, Sullivan County
Troop G/2/278 ACR, Greeneville, Greene County
Company H/2/278 ACR, Erwin, Unicoi County
HOW Battery (-)/2/278 ACR, Pigeon Forge, Sevier County
Detachment 1, HOW Battery, 2/278 ACR, Jefferson City, Jefferson County

Headquarters/Headquarters Troop/3rd Squadron/278th ACR, Cookeville, Putnam County
hq3278@tn.ngb.army.mil

Detachment 1, Headquarters/Headquarters Troop/3/278 ACR,Gordonsville, Smith County
Troop I/3/278 ACR, McMinnville, Warren County
Troop K (-)/3/278 ACR, Jamestown, Fentress County
Detachment 1, Troop K/3/278 ACR, Livingston, Overton County
Troop L (-)/3/278 ACR, Springfield, Robertson County
Detachment 1, Troop L/3/278 ACR, Gallatin, Sumner County
Company M/3/278 ACR, Ashland City, Cheatham County
HOW Battery (-), 3/278 ACR, Sparta, White County
Detachment 1, HOW Battery 3/278 ACR, Smithville, DeKalb County

Headquarters/Headquarters Troop (-) /4th Squadron/278th ACR, Smyrna, Rutherford County
hq4278@tn.ngb.army.mil

Detachment 1, Headquarters/Headquarters Troop/4/278 ACR, Alcoa, Blount County
Troop N (-)/4/278 ACR, Smyrna, Rutherford County
Det 1, Troop N (-)/4/278 ACR, Alcoa, Blount County
Det 2, Troop N (-)/4/278 ACR, Jackson, Madison County
Troop O/4/278 ACR, Alcoa, Blount County
Troop P 4/278 ACR, Alcoa, Blount County
Troop Q/4/278 ACR, Smyrna, Rutherford County
Troop R/4/278 ACR, Smyrna, Rutherford County
Troop S/4/278 ACR, Smyrna, Rutherford County
Troop T (-)/4/278 ACR, Alcoa, Blount County
Det 1, Troop T/4/278 ACR, Smyrna, Rutherford County
Company A(-)/107th AVN (AVIM), Jackson, Madison County
Det 1, Co A(-)/107th AVN (AVIM), Smyrna, Rutherford County
Company E, 107th AVN (ATS), Smyrna, Rutherford County

HHT Support Squadron/278th ACR, Knoxville, Knox County
hqspt278@tn.ngb.army.mil

Troop A (-) (S&T), SPT/278 ACR, Jacksboro, Campbell County
Det 1, Troop A (-) (S&T), SPT/278 ACR, New Tazewell, Claiborne County
Troop B (-) (ORD), SPT/278 ACR, Clinton, Anderson County
Det 1, Troop B, SPT/278 ACR, Oneida, Scott County
Det 2, Troop B, SPT/278 ACR, Lafayette, Macon County
Det 3, Troop B, SPT/278 ACR, Knoxville, Knox County
Company C (MED), SPT/278 ACR, Knoxville, Knox County