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Order of Battle, 27th Division

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Approved on Oct. 29, 1918. The nickname
"THE NEW YORK DIVISION"
is indicated by the monogram "NY"
The constellation ORION is in
compliment to the Division Commander

The AEF operated with what was called “The Square Division” containing four infantry regiments of thirty-six hundred men each. Two of these regiments would make up and infantry brigade, giving each division two brigades of infantry. In addition to the infantry regiments there were twenty-four other units in each division giving a total complement of twenty-eight thousand men. This was two to three times the size of a British, French and German division.

UNIT COMMANDERS ON NOVEMBER 11, 1918

FOURTH ARMY, B.E.F.
GENERAL SIR HENRY RAWLINSON

II CORPS, A.E.F.
MAJOR GENERAL GEORGE W. READ

27th INFANTRY DIVISION, A.E.F.
MAJOR GENERAL JOHN F. O'RYAN

53rd Inf Brigade
BG. Charles I. DeBevoise

105th Infantry, formerly 2nd Regt, Inf; 71st Inf and detachment of 12th Inf, NYNG. Commanded by Col. James M. Andrews
106th Infantry, formerly 23rd Regt, Inf; 14th Inf and detachment of 12th Inf, NYNG. Commanded by Col. Franklin W. Ward

54th Inf Brigade
BG Palmer E. Pierce

107th Infantry, formerly 7th Regt, Inf; 1st Inf and a detachment of 12th Inf, NYNG. Commanded by Lt. Col. Mortimer D. Bryant
108th Infantry, formerly 3rd Regt, Inf; 74th Inf and a detachment of the 12th Inf, NYNG. Commanded by Col. Edgar S. Jennings

52nd Field Artillery Brigade
BG. George A. Wingate

104th Field Artillery, formerly 1st Regt, FA and a detachment of 12th Inf, NYNG. Commanded by Col. Merritt H. Smith
105th Field Artillery, formerly 2nd Regt, FA and a detachment of 14th Inf, NYNG. Commanded by Col. Dewitt C. Weld, Jr.
106th Field Artillery, formerly 3rd Regt, FA and detachments from the 1st, 71st and 74th Inf, NYNG. Commanded by Maj. Lewis H. Eller
102nd Trench Mortar Battery, formerly Troop I, 1st Cavalry, NYNG. Commanded by Capt. Charles Pearson, Jr.

Divisional Machine Gun Brigade
Lt. Col. Edward McLeer

104th Machine Gun Battalion (Divisional Reserve), formerly detachment of 1st Cavalry, parts of Headquarters and Supply troops of Troop F and all of Troops A, B, C, D and M, NYNG. Commanded by Maj. Chester H. King.
105th Machine Gun Battalion (attached to 53rd Infanrty Brigade), formerly Squadron A and a detachment of 1st Cavalry and separate Machine Gun Troops, NYNG. Commanded by Maj. Kenneth Gardner
106th Machine Gun Battalion (attached to 54th Infantry Brigade), formerly a detachment of 1st Cavalry, parts of H & S troops of Troop F and all of Troops E, G, H, L and K, NYNG. Commanded by Abner H. Platt.

102nd Divisional Trains Headquarters
Col. Kirby Walker

102nd Ammunition Train, formerly Ammunition Train and detachments of 1st Cavalry and 12th Inf, NYNG. Commanded by Lt. Col. James C. McLeer.
102nd Supply Train, formerly Supply Train and detachment of 12th Inf, NYNG. Commanded by Major Charles M. Tobin.
102nd Regt, Engineers, formerly 22nd Regt, Engineers and detachments of 1st, 12th, 71st, 74th Inf and Engineer Train, NYNG. Commanded by Lt. Colonel Willian S. Conrow.
102nd Engineer Train, formerly Engineer Train, NYNG. Commanded by Capt. William F. S. Root.
102nd Sanitary Train, formerly Sanitary Train, NYNG. Commanded by Lt. Col. Robert P. Wadhams.
105th Ambulance Company
106th Ambulance Company
107th Ambulance Company
108th Ambulance Company
102nd Field Signal Battalion, formerly 1st Field Signal Battalion, NYNG. Commanded by Maj. Arthur L. Howe.
Headquarters Troop, formerly Division Headquarters Troop, NYNG. Commanded by Capt. Tristam Tupper
27th Military Police Company. Commanded by Capt. Juan Ceballos

The basic combat unit of an AEF division was the 59 man platoon

Platoon Headquarters

1 Lieutenant
1 Sergeant (Armed with pistol & rifle)
4 Privates
6 Men

First Section (Hand Bomber)

2 Corporals (Armed with Pistol and Rifle)
3 Privates 1st. Class (Armed with Rifle and Pistol)
1 Private 1st Class (Armed with Rifle)
6 Privates (Armed with rifle)
12 Total Enlisted Men

Second Section (Rifle Grenadiers)

2 Corporals (Armed with Pistol and Rifle)
1 Private 1st Class (armed with rifle)
6 Privates (Armed with Rifle)
9 Total Enlisted Men (6 Rifle Grenadiers & 3 Carriers)

Third Section (Riflemen)

1 Sergeant (Armed with Pistol and Rifle)
2 Corporals (Armed with Rifle)
6 Privates 1st Class (Armed with Rifle)
8 Privates (Armed with Rifle)
17 Total Enlisted Men

Fourth Section (Automatic Riflemen)

1 Sergeant (Armed with Pistol and Rifle)
2 Corporals (Armed with Pistol and Rifle)
4 Privates 1st Class (Lewis gunners also armed with Pistol)
8 Privates (Armed with Rifle)
15 Total Enlisted Men

Total Platoon

3 Sergeants
8 Corporals
15 Privates 1st Class
32 Privates
58 Enlisted Men
1 Officer
59 Aggregate