| Battalion and Regiment | Original Lettered Company |
Final Numbered Company |
|
|---|---|---|---|
| 1st Battalion, 20th Engineers | Company A | 1st Company | |
| Company B | 30th Company | ||
| Company C | 3rd Company | ||
| 2nd Battalion, 20th Engineers | Company D | 4th Company | |
| Company E | 5th Company | ||
| Company F | 2nd Company | ||
| 3rd Battalion, 20th Engineers | Company A | 7th Company | |
| Company B | 8th Company | ||
| Company C | 9th Company | ||
| 4th Battalion, 20th Engineers | Company D | 23rd Company | |
| Company E | 11th Company | ||
| Company F | 12th Company | ||
| 5th Battalion, 20th Engineers | Company A | 13th Company | |
| Company B | 14th Company | ||
| Company C | 15th Company | ||
| 6th Battalion, 20th Engineers | Company D | 16th Company | |
| Company E | 17th Company | ||
| Company F | 18th Company | ||
| 7th Battalion, 20th Engineers | Company A | 19th Company | |
| Company B | 20th Company | ||
| Company C | 21st Company | ||
| 8th Battalion, 20th Engineers | Company D | 22nd Company | |
| Company E | 10th Company | ||
| Company F | 24th Company | ||
| 9th Battalion, 20th Engineers | Company A | 25th Company | |
| Company B | 26th Company | ||
| Company C | 27th Company | ||
| 10th Battalion, 20th Engineers | Company D | 28th Company | |
| Company E | 29th Company | ||
| Company F | 6th Company | ||
| Company G * | 31st Company * | ||
| 1st Battalion, 10th Engineers | 11th Battalion, 20th Engineers | Company A | 32nd Company |
| Company B | 33rd Company | ||
| Company C | 34th Company | ||
| 2nd Battalion, 10th Engineers | 12th Battalion, 20th Engineers | Company D | 35th Company |
| Company E | 36th Company | ||
| Company F | 37th Company | ||
| 41st Engineers | 13th Battalion, 20th Engineers | Company A | 38th Company |
| Company B | 39th Company | ||
| Company C | 40th Company | ||
| Company D | 41st Company | ||
| 42nd Engineers | [Regimental HQ Disbanded] | Company A | 42nd Company |
| Company B | 43rd Company | ||
| Company C | 44th Company | ||
| Company D | 45th Company | ||
| 43rd Engineers | 14th Battalion, 20th Engineers | Company A | 46th Company |
| Company B | 47th Company | ||
| Company C | 48th Company | ||
| Company D | 49th Company | ||
| Original Battalion | Original Lettered Company |
Final Numbered Company |
|---|---|---|
| 503rd Engineer Service Battalion (Forestry) | Company A | 1st Engineer Service Company (Forestry) |
| Company B | 2nd Engineer Service Company (Forestry) | |
| Company C | 3rd Engineer Service Company (Forestry) | |
| Company D | 4th Engineer Service Company (Forestry) | |
| 507th Engineer Service Battalion (Forestry) | Company A | 5th Engineer Service Company (Forestry) |
| Company B | 6th Engineer Service Company (Forestry) | |
| Company C | 7th Engineer Service Company (Forestry) | |
| Company D | 8th Engineer Service Company (Forestry) | |
| 517th Engineer Service Battalion (Forestry) | Company A | 9th Engineer Service Company (Forestry) |
| Company B | 10th Engineer Service Company (Forestry) | |
| Company C | 11th Engineer Service Company (Forestry) | |
| Company D | 12th Engineer Service Company (Forestry) | |
| 519th Engineer Service Battalion (Forestry) | Company A | 13th Engineer Service Company (Forestry) |
| Company B | 14th Engineer Service Company (Forestry) | |
| Company C | 15th Engineer Service Company (Forestry) | |
| Company D | 16th Engineer Service Company (Forestry) | |
| 523rd Engineer Service Battalion (Forestry) | Company A | 17th Engineer Service Company (Forestry) |
| Company B | 18th Engineer Service Company (Forestry) | |
| Company C | 19th Engineer Service Company (Forestry) | |
| Company D | 20th Engineer Service Company (Forestry) | |
| 531st Engineer Service Battalion (Forestry) | Company A | 21st Engineer Service Company (Forestry) |
| Company B | 22nd Engineer Service Company (Forestry) | |
| Company C | 23rd Engineer Service Company (Forestry) | |
| Company D | 24th Engineer Service Company (Forestry) | |
| 533rd Engineer Service Battalion (Forestry) | Company A | 25th Engineer Service Company (Forestry) |
| Company B | 26th Engineer Service Company (Forestry) | |
| Company C | 27th Engineer Service Company (Forestry) | |
| Company D | 28th Engineer Service Company (Forestry) |