Armored Division, US Army, 06.06.44

Armored Divisions As of 15 September 1943 Known as the "Light" armored divisional organization.
Division date raised	Tank Battalions	Armored Infantry Battalions	Artillery Battalions	Armored Recon Battalion	Armored Engineer Battalion	Ordnance Maintenance Battalion	Armored Medical Battalion	Armored Signal Company
1 Armored 15.07.40 [see Notes]	1 4 13	6 11 14	27 68 91	81	16	123	47	141
4 Armored 15.04.41	8 35 37	10 51 53	22 66 94	25	24	126	46	144
5 Armored 01.10.41	10 34 81	15 46 47	47 71 95	85	22	127	75	145
6 Armored 15.02.42	15 68 69	9 44 50	128 212 231	86	25	128	76	146
7 Armored 01.03.42	17 31 40	23 38 48	434 440 489	87	33	129	77	147
8 Armored 01.04.42	18 36 80	7 49 50	128 212 231	86	25	130	78	148
9 Armored 15.07.42	2 14 19	27 52 60	3 16 73	89	9	131	2	149
10 Armored 15.07.42	3 11 21	20 54 61	419 420 423	90	55	132	80	150
11 Armored 15.08.42	22 41 42	21 55 63	490 491 292	41	56	133	81	151
12 Armored 15.09.42	23 43 714	17 56 66	493 494 495	92	119	134	82	152
13 Armored 15.10.42	24 45 46	16 59 67	496 497 498	93	124	135	83	153
14 Armored 15.11.42	25 47 48	19 62 68	499 500 501	94	125	136	84	154
16 Armored 15.07.43	5 16 26	18 64 69	395 396 397	23	216	137	216	156
20 Armored 15.03.43	9 20 27	8 65 70	412 413 414	33	220	138	220	160
Notes: The 1st AD in Italy was retained as the Fifth Army reserve throughout, so could not afford the month-plus time required for the changeover. About half of the division was then committed to SHINGLE in early January 1944 and thus agains the changeover was delayed. Finally, at the end of the Rome Campaign it was to make the change, and was starting converted to this "light" organization as of 20.07.44. The 2nd and 3rd AD were in England when the new organization was introduced. But both divisons were tasked as the armored reserve in OVERLORD, filling essentially the same task as CCB, 1st AD at Anzio. It was felt that the redundancies built into the divisions (which McNair believed to be inefficiences) meant that the divisions were more robust. However, a second major factor was that the equipment required to make the change, including 4 2 M-4 105mm, were not going to be available until July, when the light armored divisions themselves were going to begin to be available. It was finally felt that the changeover simply wasn't worth it in the circumstances and Marshall granted Eisenhower's request for the two divisions to be exempted. The 2nd and 3rd Armored Divisions retained their 1942 "heavy" organization until after the war.