OrBat, Rome to the Arno

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OrBat, Op. Grapeshot    Breakthrough, 1945 To the Po Past the Po
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██ Allied Order of Battle - Rome to the Arno Line ██

Key dates (all 1944):

4 June - Rome occupied by US Fifth Army.
18 July - Polish Corps captures port of Ancona on the Adriatic.
25 August - Operation Olive offensive begins in British Eighth Army sector.
9 September - US Rome-Arno Campaign ends.
10 September - US Northern Apennines Campaign begins.

................................................................ 15th Army Group (Alexander) ...............................................................

During the US Fifth Army Reorganization, June & July 1944:

Fifth Army lost most of its experienced divisions, as VI Corps and FEC (French Expeditionary Corps) were withdrawn for the southern France invasion,
IV Corps became active on Fifth Army's left wing.
II Corps was inactive much of the time.
late in this period, British XIII Corps was assigned to Fifth Army's right wing.

After the fall of Rome, the British 1st and 5th divisions, which had participated in the Anzio Campaign, reverted to British Eighth Army control. The British 5th Infantry Division was sent to Palestine in Jul 1944, returning to Italy in early 1945.
8 June - 1st Armored Division withdrawn from VI corps for conversion from heavy armored division to light armored division, reassigned to IV Corps 16 June.
11 June - VI Corps replaced on Fifth Army's left wing by IV Corps (Willis Crittenberger), with 36th Infantry Division transferred from VI Corps to IV Corps.
15 June - VI corps, along with the 3rd and 45th Infantry Divisions, reassigned from Fifth Army to Seventh Army.
26 June - 34th Infantry Division reassigned from VI Corps to IV Corps.
12 July - 36th Infantry Division reassigned from IV Corps to VI Corps.
24 July - 34th Infantry Division reassigned from IV Corps to Fifth Army.
VI Corps with 3rd, 36th and 45th Infantry divisions left with VI Corps to prepare for the 15 August 1944 invasion of southern France.
22 July - Fifth Army lost the last of the French Expeditionary Corps of three divisions, being transferred to participate in the southern France invasion. The French sector was turned over to the British XIII Corps
24 July -

During this period, the 85th Infantry, 88th Infantry and the newly-arrived 91st Infantry Divisions were shifted between II Corps and IV Corps as the need arose.

◼ US Fifth Army (Clark)
⏶ US Fifth Army Reserve

US 3rd Infantry Division (O'Daniel), from US II Corps 5 June 1944, to US VI Corps 15 July 1944, landed southern France 15 August 1944

⏶ US IV Corps (Crittenberger), HQ arrived in Italy 28 March 1944

US 36th Infantry Division (Walker), from US VI Corps 11 June 1944, relieved from combat 26 June 1944, to US VI Corps 13 July 1944, landed southern France 15 August 1944
US 34th Infantry Division (Ryder until 21 July 1944, then Bolte), from US VI Corps 26 June 1944 replacing US 36th Infantry Division
US 1st Armored Division (Harmon until 17 July 1944, then Pritchard), from US Fifth Army reserve 16 June 1944
US 88th Infantry Division (Sloan), to US II Corps 25 July 1944
US 91st Infantry Division (Livesay), from US Fifth Army reserve 12 July 1944
South African 6th Armoured Division (Poole), from British XIII Corps 22 August 1944

⏶ French Expeditionary Corps (Juin), relieved 22 July 1944 by extension to the left of British XIII Corps, divisions transitioned to southern France

3rd Algerian Infantry Division (de Monsabert)
2nd Moroccan Infantry Division (Dody)
4th Moroccan Mountain Division (Sevez)

⏶ US II Corps (Keyes), in line on US Fifth Army right wing 25 July 1944

US 85th Infantry Division (Coulter), from US Fifth Army reserve 25 July 1944
US 88th Infantry Division (Sloan), from US IV Corps 25 July 1944
US 91st Infantry Division (Livesay), from US IV Corps 31 July 1944

◼ British Eighth Army (Leese)
⏶ Under British Eighth Army control:

South African 6th Armoured Division (Poole), from Canadian I Corps 6 Jun 1944, to US IV Corps 22 Aug 1944.

⏶ British XIII Corps (Kirkman):

South African 6th Armoured Division (Poole) - from British XIII Corps 6 Aug 1944; to US IV Corps 22 Aug 1944.
British 4th Infantry Division (Ward) - to British V Corps 11 Aug 1944.
British 78th Infantry Division (Keightley until Aug 1944 , then Butterworth) - to Egypt for refitting 18 Jul 1944.
British 6th Armoured Division (Evelegh until 24 Jul 1944, then Templer), Aug 1944.
2nd New Zealand Division (Freyberg), from refitting near Rome 14 Jul 1944

⏶ British X Corps (McCreery)

British 6th Armoured Divison (Evelegh) - to British XIII Corps 29 Jun 1944.
2nd New Zealand Division (Freyberg)
8th Indian Infantry Division (Russell) - to British XIII Corps 29 Jun 1944.
10th Indian Infantry Division (Whitehorn) - from British V Corps Jun 1944; to British V Corps Sep 1944.
4th Indian Infantry Divison (Holworthy) - from British V Corps 8 Jul 1944.

⏶ British V Corps (Allfrey until 8 Aug 1944, then Keightley) - replaced by Polish II Corps Jun 1944 as Eighth Army's right wing on Adriatic coast.

British 1st Infantry Division (Penney until 14 June 1944, then Loewen) - from US VI Corps 1 July 1944.
British 46th Infantry Division (Hawkesworth) - from refitting in Palestine 3 Jul 1944.
British 4th Infantry Division (Ward) - from British XIII Corps 11 Aug 1944.

⏶ Polish II Corps (Anders) - to Adriatic coast replacing V Corps as British Eighth Army's right wing Jun 1944.

Polish 5th Kresowa Infantry Division (Sulik) - to Adriatic coast beginning 18 Jun 1944.
Polish 3rd Carpathian Infantry Division (Duch) - to Adriatic coast replacing 4th Indian Division 15 Jun 1944.

⏶ I Canadian Corps (Burns) not active during this period

1st Canadian Infantry Division (Vokes)
5th Canadian Armoured Division (Hoffmeister)
6th South African Armoured Division (Poole) - to British Eighth Army control 6 Jun 1944.