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United States Army
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Infantry Division
15 July 1943
Infantry Division
 
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Infantry Divisions
15 July 1943 to 24 January 1945
Division      Infantry
Regiment
Field
Artillery
Battalion
Mechanized
Recon
Troop
Engineer
Battalion
Medical
Battalion
Ordnance
Maintenance
Company
Quarter-
Master
Company
Signal
Company
Military
Police
Platoon
1 Infantry (RA)
activated: pre-WWII     
16     
18     
26     
5 (155mm)
7 (105mm)
32 (105mm)
33 (105mm)
1      1      1      701      1      1      1     
2 Infantry (RA)
activated: pre-WWII     
9     
23     
38     
12 (155mm)
15 (105mm)
37 (105mm)
38 (105mm)
2      2      2      702      2      2      2     
3 Infantry (RA)
activated: pre-WWII     
7     
15     
30     
9 (155mm)
10 (105mm)
39 (105mm)
41 (105mm)
3      10      3      703      3      3      3     
4 Infantry (RA)
activated: 01.06.40
converted: 04.08.43
[Note 1]     
8     
12     
22     
20 (155mm)
29 (105mm)
42 (105mm)
44 (105mm)
4      4      4      704      4      4      4     
5 Infantry (RA)
activated: 16.10.39     
2     
10     
11     
19 (105mm)
21 (155mm)
46 (105mm)
50 (105mm)
5      7      5      705      5      5      5     
6 Infantry (RA)
activated: 10.10.39     
1     
20     
63     
1 (105mm)
51 (105mm)
53 (105mm)
80 (155mm)
6      6      6      706      6      6      6     
7 Infantry (RA)
activated: 01.07.40
[Note 2]     
17     
32     
159     
31 (155mm)
48 (105mm)
49 (105mm)
57 (105mm)
7      13      7      707      7      7      7     
8 Infantry (RA)
activated: 01.07.40     
13     
28     
121     
28 (155mm)
43 (105mm)
45 (105mm)
56 (105mm)
8      12      8      708      8      8      8     
9 Infantry (RA)
activated: 01.08.40     
39     
47     
60     
26 (105mm)
34 (155mm)
60 (105mm)
84 (105mm)
9      15      9      709      9      9      9     
24 Infantry (RA)
activated: 01.10.41
[Note 3]     
19     
21     
34     
299     
11 (155mm)
13 (105mm)
52 (105mm)
63 (105mm)
24      3      24      724      24      24      24     
25 Infantry (AUS)
activated: 01.10.41
[Note 4]     
27     
35     
161     
8 (105mm)
64 (105mm)
89 (105mm)
90 (155mm)
25      65      25      725      25      25      25     
26 Infantry (NG)
converted: 12.02.42
[Note 5]     
101     
104     
181     
101 (105mm)
102 (105mm)
180 (155mm)
262 (105mm)
26      101      114      726      26      39      101     
27 Infantry (NG)
converted: 01.09.42     
105     
106     
165     
104 (105mm)
105 (105mm)
106 (155mm)
249 (105mm)
27      102      102      727      27      27      102     
28 Infantry (NG)
converted: 17.02.42     
109     
110     
112     
107 (105mm)
108 (155mm)
109 (105mm)
229 (105mm)
28      103      103      728      28      28      103     
29 Infantry (NG)
converted: 12.03.42     
115     
116     
175     
110 (105mm)
111 (105mm)
224 (105mm)
227 (155mm)
29      121      104      729      29      29      104     
30 Infantry (NG)
converted: 16.02.42     
117     
119     
120     
113 (155mm)
118 (105mm)
197 (105mm)
230 (105mm)
30      105      105      730      30      30      105     
31 Infantry (NG)
converted: 27.02.42
[Note 6]     
154     
155     
167     
114 (155mm)
116 (105mm)
117 (105mm)
149 (105mm)
31      106      106      731      31      31      106     
32 Infantry (NG)
converted: 01.02.42     
126     
127     
128     
120 (105mm)
121 (155mm)
126 (105mm)
129 (105mm)
32      114      107      732      32      32      107     
33 Infantry (NG)
converted: 21.02.42
[Note 7]     
123     
129     
130     
136     
122 (105mm)
123 (155mm)
124 (105mm)
210 (105mm)
33      108      108      733      33      33      108     
34 Infantry (NG)
converted: 01.02.42     
133     
135     
268     
125 (105mm)
151 (105mm)
175 (105mm)
185 (155mm)
34      109      109      734      34      34      109     
35 Infantry (NG)
converted: 01.03.42     
134     
137     
320     
127 (155mm)
161(105mm)
216 (105mm)
219 (105mm)
35      60      110      735      35      35      110     
36 Infantry (NG)
converted: 01.02.42     
141     
143     
143     
131 (105mm)
132 (105mm)
133 (105mm)
155 (155mm)
36      111      111      736      36      36      111     
37 Infantry (NG)
converted: 01.02.42
[Note 8]     
145     
148     
6 (105mm)
135 (105mm)
136 (155mm)
140 (105mm)
37      117      112      737      37      37      112     
38 Infantry (NG)
converted: 01.03.42     
149     
151     
152     
138 (105mm)
139 (105mm)
150 (155mm)
163 (105mm)
38      113      113      738      38      38      113     
40 Infantry (NG)
converted: 18.02.42     
108     
165     
185     
143 (105mm)
164 (105mm)
213 (105mm)
222 (155mm)
40      115      115      740      40      40      115     
41 Infantry (NG)
converted: 17.02.42     
162     
163     
186     
146 (105mm)
167 (105mm)
205 (105mm)
218 (155mm)
41      116      116      741      41      41      116     
42 Infantry (NG)
activated: 14.07.43 as (AUS)     
222     
232     
242     
232 (105mm)
392 (105mm)
402 (105mm)
542 (155mm)
42      142      122      742      42      132      ?     
43 Infantry (NG)
converted: 19.02.42     
103     
169     
172     
103 (105mm)
152 (105mm)
169 (105mm)
192 (155mm)
43      118      118      743      43      43      118     
44 Infantry (NG)
converted: 16.02.42     
71     
114     
324     
156 (105mm)
157 (155mm)
217 (105mm)
220 (105mm)
44      63      119      744      44      44      119     
45 Infantry (NG)
converted: 23.02.42     
157     
179     
180     
168 (105mm)
160 (105mm)
171 (105mm)
189 (155mm)
45      120      120      700      45      45      120     
63 Infantry (AUS)
activated: 15.06.43     
253     
254     
255     
718 (155mm)
861 (105mm)
862 (105mm)
863 (105mm)
63      263      363      763      63      563      ?     
65 Infantry (AUS)
activated: 16.08.43     
259     
260     
261     
720 (155mm)
867 (105mm)
868 (105mm)
869 (105mm)
65      265      365      765      65      565      ?     
66 Infantry (AUS)
activated: 15.04.43     
262     
263     
264     
721 (155mm)
870 (105mm)
871 (105mm)
872 (105mm)
66      266      366      766      66      566      ?     
69 Infantry (AUS)
activated: 15.05.43     
271     
272     
273     
724 (155mm)
879 (105mm)
880 (105mm)
881 (105mm)
69      269      369      769      69      569      ?     
70 Infantry (AUS)
activated: 15.06.43     
274     
275     
276     
725 (155mm)
882 (105mm)
883 (105mm)
884 (105mm)
70      270      370      770      70      570      ?     
71 Infantry (AUS)
activated: 15.07.43
converted: 26.05.44
[Note 9]     
5     
14     
66     
564 (155mm)
607 (105mm)
608 (105mm)
609 (105mm)
71      271      371      771      251      571      ?     
75 Infantry (AUS)
activated: 15.04.43     
289     
290     
291     
730 (155mm)
897 (105mm)
898 (105mm)
899 (105mm)
75      275      372      775      75      575      ?     
76 Infantry (OR)
activated: 15.06.42
converted: 01.08.42     
304     
385     
417     
302 (105mm)
355 (105mm)
364 (155mm)
901 (105mm)
76      301      301      776      76      76      ?     
77 Infantry (OR)
activated: 25.03.42
converted: 01.08.42     
305     
306     
307     
304 (105mm)
305 (105mm)
306 (155mm)
902 (105mm)
77      302      302      777      77      77      ?     
78 Infantry (OR)
activated: 20.02.42
converted: 01.03.43     
309     
310     
311     
308 (105mm)
308 (105mm)
309 (155mm)
903 (105mm)
78      303      303      778      78      78      ?     
79 Infantry (OR)
activated: 12.06.42
converted: 01.08.42     
313     
314     
315     
310 (105mm)
311 (105mm)
312 (155mm)
904 (105mm)
79      304      304      779      79      79      ?     
80 Infantry (OR)
activated: 15.06.42
converted: 01.08.42     
317     
318     
319     
313 (105mm)
314 (105mm)
315 (155mm)
905 (105mm)
80      305      305      780      80      80      ?     
81 Infantry (OR)
activated: 15.06.42
converted: 01.08.42     
321     
322     
323     
316 (105mm)
317 (105mm)
318 (155mm)
906 (105mm)
81      306      306      781      81      81      ?     
83 Infantry (OR)
activated: 15.08.42
converted: 15.08.42     
329     
330     
331     
322 (105mm)
232 (105mm)
324 (155mm)
908 (105mm)
83      308      308      783      83      83      ?     
84 Infantry (OR)
activated: 15.10.42
converted: 15.10.42     
333     
334     
335     
325 (105mm)
326 (105mm)
327 (155mm)
909 (105mm)
84      309      309      784      84      84      ?     
85 Infantry (OR)
activated: 15.05.42
converted: 01.08.42     
337     
338     
339     
328 (105mm)
329 (105mm)
403 (155mm)
910 (105mm)
85      310      310      785      85      85      ?     
86 Infantry (OR)
activated: 15.12.42
converted: 15.12.42     
341     
342     
343     
331 (105mm)
332 (105mm)
404 (155mm)
911 (105mm)
86      311      311      786      86      86      ?     
87 Infantry (OR)
activated: 15.12.42
converted: 15.12.42     
345     
346     
347     
334 (105mm)
335 (155mm)
336 (105mm)
912 (105mm)
87      312      312      787      87      87      ?     
88 Infantry (OR)
activated: 15.07.42
converted: 01.08.42     
349     
350     
351     
337 (105mm)
338 (105mm)
339 (155mm)
913 (105mm)
88      313      313      788      88      88      ?     
89 Infantry (OR)
activated: 15.07.42
converted: 05.06.44
[Note 10]     
353     
354     
355     
340 (105mm)
341 (105mm)
563 (155mm)
914 (105mm)
89      314      314      714      405      89      ?     
90 Infantry (OR)
activated: 25.03.42
converted: 01.05.43     
357     
358     
359     
343 (105mm)
344 (105mm)
345 (155mm)
915 (105mm)
90      315      315      790      90      90      ?     
91 Infantry (OR)
activated: 15.08.42
converted: 15.08.42     
361     
362     
363     
346 (105mm)
347 (105mm)
348 (155mm)
916 (105mm)
91      316      316      791      91      91      ?     
92 Infantry (Colored)(AUS)
activated: 15.10.42     
365     
370     
371     
597 (105mm)
598 (105mm)
599 (105mm)
600 (155mm)
92      317      317      792      92      92      ?     
93 Infantry (Colored)(AUS)
activated: 15.05.42     
25     
368     
369     
593 (105mm)
594 (105mm)
595 (105mm)
596 (155mm)
93      318      318      793      93      93      ?     
94 Infantry (OR)
activated: 15.09.42
converted: 15.09.42     
301     
302     
376     
301 (105mm)
356 (105mm)
390 (155mm)
919 (105mm)
94      319      319      794      94      94      ?     
95 Infantry (OR)
activated: 15.07.42
converted: 01.08.42     
377     
378     
379     
359 (105mm)
359 (105mm)
369 (155mm)
920 (105mm)
95      320      320      795      95      95      ?     
96 Infantry (OR)
activated: 15.08.42
converted: 15.08.42     
381     
382     
383     
361 (105mm)
362 (105mm)
363 (155mm)
921 (105mm)
96      321      321      796      96      96      ?     
97 Infantry (OR)
activated: 25.02.43
converted: 25.02.43     
303     
386     
387     
303 (105mm)
365 (105mm)
389 (155mm)
922 (105mm)
97      322      322      797      97      97      ?     
98 Infantry (OR)
activated: 15.09.42
converted: 15.09.42     
389     
390     
391     
367 (105mm)
368 (105mm)
369 (155mm)
923 (105mm)
98      323      323      798      98      98      ?     
99 Infantry (OR)
activated: 15.11.42
converted: 15.11.42     
393     
394     
395     
370 (105mm)
371 (105mm)
372 (155mm)
924 (105mm)
99      324      324      799      99      99      ?     
100 Infantry (OR)
activated: 15.11.42
converted: 15.11.42     
397     
398     
399     
373 (155mm)
274 (105mm)
375 (105mm)
925 (105mm)
100      325      325      800      100      100      ?     
102 Infantry (OR)
activated: 15.09.42
converted: 15.09.42     
405     
406     
407     
379 (105mm)
380 (105mm)
381 (155mm)
927 (105mm)
102      327      327      802      102      102      ?     
103 Infantry (OR)
activated: 15.11.42     
409     
410     
411     
382 (105mm)
383 (105mm)
384 (155mm)
928 (105mm)
103      328      328      803      103      103      ?     
104 Infantry (OR)
activated: 15.09.42
converted: 15.09.42     
413     
414     
415     
385 (105mm)
386 (105mm)
387 (155mm)
929 (105mm)
104      329      329      804      104      104      ?     
106 Infantry (AUS)
activated: 15.02.43     
422     
423     
424     
589 (105mm)
590 (105mm)
591 (105mm)
592 (155mm)
106      81      331      806      106      106      ?     
Americal (AUS)
activated: 24.05.42     
132     
164     
182     
221 (155mm)
245 (105mm)
246 (105mm)
247 (105mm)
21      57      121      721      125      26      ?     
Notes:
(RA)   Regular Army divisions which existed before World War II..
(NG)   National Guard divisions (having been inducted into Federal service) converted to infantry divisions.
(OR)   Organized Reserve divisions ordered into active military service. Some divisions were activated directly as infantry divisions, while others were converted later. Some, but not all of these latter divisions functioned as Replacement Pool divisions until they too were finally converted to infantry divisions.
(AUS) Army of the United States divisions were new divisions activated during World War II, encompassing units that had not been a part of the pre-war mobilization plans.
[1] The 4th Motorized Division until 04.08.43.
[2] The 159th Infantry Regiment was replaced by the 184th Infantry Regiment on 23.08.43.
[3] The 299th Infantry Regiment was inactivated on 21.07.43.
[4] The 181st Infantry Regiment was replaced by the 328th Infantry Regiment on 27.07.43.
[5] The 154th Infantry Regiment was replaced by the 124th Infantry Regiment on 05.04.44.
[6] The 129th Infantry Regiment was relieved from the division on 31.07.43.
[7] The 129th Infantry Regiment was assigned to the division on 31.07.42.
[8] The 165th Infantry Regiment was replaced by the 160th Infantry Regiment on 25.12.43.
[9] The 71st Light Division (Pack, Jungle) until 26.05.44.
[10] The 89th Light Division (Truck) until 05.06.44.
 
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