Appendix E: Chronology of Main Planning Papers from 1 January 1944
| Date | Hq | Paper |
| 31 Jan | FUSA | Planning Directive for OVERLORD |
| 1 Feb | Joint Commanders | NEPTUNE, Initial Joint Plan |
| 4 Feb | Second Army (Br) | Outline Plan |
| 10 Feb | TF 122, FUSA | Joint Agreement for Amphibious Operations |
| 12 Feb | V Corps | Preliminary ‘OVERLORD’ Plan |
| 25 Feb | FUSA | Operations Plan NEPTUNE |
| 28 Feb | V Corps | Planning Guide, Operation “OVERLORD” |
| 28 Feb | ANCXF | Operation “NEPTUNE”—Naval Plan* |
| 7 Mar | 21 AGp | Directive to FUSAG |
| 10 Mar | SHAEF | Directive to 21 A Gp, AEAF, ANCFX |
| 20 Mar | Second Army, 83 | Joint Plan Group (2nd TAF) |
| 26 Mar | V Corps | NEPTUNE Plan |
| 27 Mar | VII Corps | Plan of Operation, NEPTUNE |
| 8 Apr | 21 A Gp, ANCXF | NEPTUNE Joint Fire Plan |
| 10 Apr | ANCXF | Operation NEPTUNE-Naval Orders (ON) |
| 15 Apr | AEAF | Operation NEPTUNE-Overall Air Plan |
| 16 Apr | 1st Div | Field Order No. 35 |
| 21 Apr | WNTF | Operation Plan No. 24 (ONWEST 2)† |
| 24 Apr | War Office | Movement Plan |
| 28 Apr | 21 AGp | Amended Directive to FUSAG |
| 1 May | ANCXF | Amendment No. 1 to ON |
| 2 May | Ninth AF | IX Tactical Air Command Plan for Operation NEPTUNE |
| 6 May | 82nd Abn Div | Field Order No. 6 |
| 8 May | FUSAG, 9th AF, WNTF | Joint Operations Plan, U.S. Forces for Operation OVERLORD (Revised) |
| 9 May | VII Corps | Field Order No. 1 |
| 12 May | 4th Div | Field Order No. 1 |
| 15 May | Assault Force U | Operation Order No. 3-44 (ON-WEST/U-3)‡ |
* Superseded by Operation NEPTUNE—Naval Orders (ON) . All copies ordered destroyed.
† Changes of 4,10, and 22 May and addenda of 29-31 May.
‡ Changes of 30 May and 1 June.
| Date | Hq | Paper |
| 18 May | V Corps | Letter of Instruction, Amending NEPTUNE Plan |
| 18 May | 101st Abn Div | Field Order No. 1 |
| 20 May | Assault Force O | Operation Order No. BB-44 (ON-WEST/O) |
| 27 May | FUSA | Revision No. 2 to Annex 12 (Fire Support) |
| 28 May | 82nd Abn Div | Revision of Field Order No. 6 |
| 28 May | VII Corps | Field Order No. 1 (Corrected Copy) |