Force Organization Jul – Nov 1917 Division Headquarters 1st Brigade 7th Infantry 12th Infantry 14th Infantry 2d Brigade 1st Infantry 23d Infantry 71st Infantry 3d Brigade 2d Infantry 3d Infantry 74th Infantry Brigade Field Artillery 1st Field Artillery 2d Field Artillery 3d Field Artillery 1st Cavalry Squadron A and Machine Gun Troop 22d Engineers 1st Battalion, Signal Corps Trains Military Police Ammunition Train Supply Train Engineer Train Sanitary Train Headquarters Ambulance Companies 1st Ambulance Company 2d Ambulance Company 3d Ambulance Company 4th Ambulance Company Headquarters Field Hospital 1st Field Hospital 2d Field Hospital 3d Field Hospital 4th Field Hospital Organization from Nov 1917 Initially 3 brigades consisting of 3 infantry regiments each, for a total of nine regiments. Reorganized into 2 brigades of 2 infantry regiments each. Headquarters, 27th Division 53rd Infantry Brigade 105th Infantry Regiment 106th Infantry Regiment 105th Machine Gun Battalion 54th Infantry Brigade 107th Infantry Regiment 108th Infantry Regiment 106th Machine Gun Battalion 52nd Field Artillery Brigade 104th Field Artillery Regiment (75 mm) 105th Field Artillery Regiment (75 mm) 106th Field Artillery Regiment (155 mm) 102nd Trench Mortar Battery 104th Machine Gun Battalion 102nd Engineer Regiment 102nd Field Signal Battalion Headquarters Troop, 27th Division 102nd Train Headquarters and Military Police 102nd Ammunition Train 102nd Supply Train 102nd Engineer Train 102nd Sanitary Train 105th, 106th, 107th, and 108th Ambulance Companies and Field Hospitals The artillery elements were reassigned upon arrival in France, and did not see service with the 27th Division during combat. Organization, WWII Headquarters, 27th Infantry Division 105th Infantry Regiment 106th Infantry Regiment, 165th Infantry Regiment Headquarters and Headquarters Battery, 27th Infantry Division Artillery 104th Field Artillery Battalion 105th Field Artillery Battalion 106th Field Artillery Battalion 249th Field Artillery Battalion 102nd Engineer Combat Battalion 102nd Medical Battalion 27th Cavalry Reconnaissance Troop (Mechanized) Headquarters, Special Troops, 27th Infantry Division Headquarters Company, 27th Infantry Division 727th Ordnance Light Maintenance Company 27th Quartermaster Company 27th Signal Company Military Police Platoon Band 27th Counterintelligence Corps Detachment Organization, 1948 to 1954 Division Headquarters & Headquarters Co. Infantry: 105th Infantry Regiment, 108th Infantry Regiment, 174th Infantry Regiment. Artillery: DIVARTY, 156th Field Artillery Battalion, 170th Field Artillery Battalion, 249th Field Artillery Battalion, 127th AAA Battalion (from 106th AAA, from 7th AAA, from 106th of WW2). Combat support: 127th Tank Battalion, 152nd Engineer Battalion, 27th Recon Troop, 27th Signal Company Combat service support: 27th Military Police Company, 727th Ordnance Company, 27th Quartermaster Company, 134th