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During 1943, the vehicles were used for training or put into storage. From
February to May 1944, before the invasion of France, 74 M12s were overhauled in preparation for combat operations overseas. They were assigned to six armored field artillery battalions (the 258th, 557th, 558th, 987th, 989th,
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tank. The engine was moved forward to the center of the vehicle to allow room for the gun mount, and most vehicles used later M4-style bogies with trailing return rollers. The armored compartment at the front was occupied by the driver and commander. The gun crew were located in an open-topped area
581:, where the M12 earned its nickname "Doorknocker" thanks to the 155mm cannon's ability to fire armour piercing rounds through seven feet of concrete at ranges up to 2,000 yards (1,830 meters). The vehicle was also dubbed "King Kong" by American operators due to the raw power of its gun.
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An earth spade (similar to a bulldozer blade) at the rear was employed to absorb recoil. This layout (large gun mounted in an open mount at the rear, with a spade) was the pattern adopted for many years by other pieces of heavy self-propelled artillery.
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gun of World War I vintage. The main armament had a traverse of 14° and elevation limits of +30° to -5°. Limited storage space meant that only 10 155 mm projectiles and propellant charges could be carried on the vehicle.
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at the back of the vehicle. It mounted a 155 mm gun M1917, M1917A1 or M1918 M1, depending upon availability, a weapon derived from the nearly identical French
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50:
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577:, during assaults on heavy fortifications, the M12s were sometimes employed in a direct-fire role, such as in the Allied assault on the
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in asking for 50 units, 100 were authorized and built by March 1943. These vehicles were at first used for training.
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to transport the rest of the gun crew, battery stores, and ammunition. Identical to the M12 except for the gun and
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Given the limited ammunition carried in the M12, a support vehicle based on the same chassis was produced as the
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The idea for the M12 was first proposed in 1941 and the pilot - T6 GMC - built and tested in early 1942. The
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553:, it could carry 40 rounds of 155 mm ammunition, and was armed with a .50-caliber (12.7 mm)
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the successor to the 155mm M1918. Postwar, the M12 was retired from service and replaced by the M40.
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in a ring mount for self-defense. In operational conditions, the M12 and M30 would serve in pairs.
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Official
Munitions Production of the United States, by Months, July 1, 1940 - August 31, 1945
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604:"Adolph's Assassin" on display at the U.S. Army Artillery Museum, Fort Sill, Oklahoma
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701:(War Production Board and Civilian Production Administration, 1 May 1947) p. 231
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624:, United States, before being transferred to Fort Sill in November 2010.
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732:
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Only 100 vehicles were built: 60 in 1942 and a further 40 in 1943.
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155 mm (6.1 in) M1917, M1918, or M1918M1 gun in Mount M4
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American armored fighting vehicle production during World War II
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and 991st) and employed successfully throughout the campaign in
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6 (Commander, driver, 4 gun crew) with remaining gun crew in M30
800:
26:
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initially rejected the design as unnecessary, but after the
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World War II armored fighting vehicles of the United States
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22 ft 1 in (6.73 m) hull, spade retracted
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Cold War armored fighting vehicles of the United States
588:, designed on a late-war M4A3 Sherman chassis with the
396:. It mounted a 155 mm gun derived from the French
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The same epithet was given by German troops to their
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8 ft 9 in (2.67 m) without sand shields
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M12 firing across the
Moselle River in France, 1944.
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584:In 1945, the M12 was complemented in Europe by the
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22 ft 2.5 in (6.769 m) including gun
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57:. Unsourced material may be challenged and removed.
608:The sole surviving M12 GMC is displayed at the
1410:Military vehicles introduced from 1940 to 1944
751:Janes World War II Tanks and Fighting Vehicles
1380:Self-propelled artillery of the United States
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718:ability to penetrate heavily armored vehicles
8:
378:Road: 21–24 miles per hour (34–39 km/h)
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687:British and American Tanks of World War II
674:British and American Tanks of World War II
285:9 ft 5.5 in (2.883 m) over
227:September 1942 – March 1943
131:
729:"U.S. Army Field Artillery Museum | Home"
337:350 horsepower (260 kW) at 2,400 rpm
117:Learn how and when to remove this message
452:
428:The M12 was built on the chassis of the
689:, Arms and Armour Press, London, p. 145
656:
616:. It had previously been stored at the
685:Chamberlain, P. & C. Ellis (1969)
1385:World War II self-propelled artillery
7:
634:List of "M" series military vehicles
55:adding citations to reliable sources
1161:M16/M17 multiple gun motor carriage
1151:M13/M14 multiple gun motor carriage
1277:8-inch howitzer motor carriage T84
1156:M15 combination gun motor carriage
618:United States Army Ordnance Museum
25:
354:Vertical volute spring suspension
1405:Tracked self-propelled howitzers
573:Although designed primarily for
142:
31:
1166:M19 multiple gun motor carriage
42:needs additional citations for
259:59,000 pounds (27 metric tons)
232:
136:155 mm gun motor carriage M12
1:
1038:M10 3-inch gun motor carriage
386:155 mm gun motor carriage M12
1198:Light tank T7/medium tank M7
311:0.5–2 inches (13–51 mm)
158:Self-propelled artillery gun
129:Self-propelled artillery gun
1262:T18 howitzer motor carriage
1085:M39 armored utility vehicle
1005:M43 howitzer motor carriage
958:T30 howitzer motor carriage
953:T19 howitzer motor carriage
771:: United States Army. 2014.
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1282:T92/T93 gun motor carriage
1267:T54/T59 gun motor carriage
984:M8 howitzer motor carriage
978:M7 howitzer motor carriage
765:U.S. Army Artillery Museum
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995:M21 mortar motor carriage
829:armored fighting vehicles
300:
219:Pressed Steel Car Company
164:Place of origin
141:
767:(Plaque inside museum).
672:Chamberlain & Ellis
66:"M12 Gun Motor Carriage"
1131:M20 armored utility car
1103:Landing Vehicle Tracked
555:M2 Browning machine gun
368:140 miles (230 km)
1287:T88 gun motor carriage
1049:M36 gun motor carriage
1043:M18 gun motor carriage
1023:T48 gun motor carriage
1000:M40 gun motor carriage
990:M12 gun motor carriage
883:Marmon-Herrington CTLS
605:
586:M40 gun motor carriage
542:
1345:T16 universal carrier
1257:T40/M9 tank destroyer
1033:M6 gun motor carriage
1028:M3 gun motor carriage
973:M3 gun motor carriage
783:World War II vehicles
603:
541:T14/M30 cargo carrier
540:
392:developed during the
1272:T55E1 motor carriage
1218:T28 super-heavy tank
1126:M8 light armored car
51:improve this article
1095:Amphibious vehicles
963:T34 rocket launcher
792:M30 at AFV database
749:Leland Ness (2002)
455:
418:Ordnance Department
398:Canon de 155 mm GPF
345:13.06 hp/metric ton
1143:anti-aircraft guns
753:, Harper Collins,
622:Aberdeen, Maryland
606:
543:
454:Production of M12
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410:Army Ground Forces
390:self-propelled gun
203:Production history
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1177:short production
1175:Experimental and
1065:M2 half-track car
968:M4 mortar carrier
937:
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596:Surviving vehicle
568:North-West Europe
547:cargo carrier M30
533:M30 cargo carrier
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246:M30 cargo carrier
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18:M30 cargo carrier
16:(Redirected from
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1400:155 mm artillery
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731:. Archived from
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394:Second World War
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1350:T17E1 Staghound
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1313:T27 Armored Car
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1247:Self-propelled
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1213:T25 medium tank
1208:T20 medium tank
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1141:Self-propelled
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467:September 1942
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435:155 mm GPF
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414:Artillery Board
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177:In service
172:Service history
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1223:T29 heavy tank
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901:M2 medium tank
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777:External links
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735:on 2010-08-31.
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712:3.7 cm Pak 36s
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374:Maximum speed
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251:Specifications
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1193:M6 heavy tank
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1080:M9 half-track
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1075:M5 half-track
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1070:M3 half-track
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863:M2 light tank
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858:M1 combat car
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759:0-00-711228-9
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590:155 mm gun M1
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575:indirect fire
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499:January 1943
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475:October 1942
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68: –
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63:
62:Find sources:
56:
52:
46:
45:
40:This article
38:
34:
29:
28:
19:
1323:S1 Scout Car
1179:run vehicles
1121:M3 Scout Car
1113:Armored cars
929:M26 Pershing
833:World War II
764:
750:
744:Bibliography
733:the original
723:
715:
706:
698:
694:
686:
681:
673:
607:
583:
572:
564:
551:recoil spade
546:
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427:
407:
385:
383:
342:Power/weight
216:Manufacturer
197:World War II
185:Used by
113:
104:
94:
87:
80:
73:
61:
49:Please help
44:verification
41:
878:M24 Chaffee
714:due to its
515:March 1943
424:Description
404:Development
400:field gun.
388:was a U.S.
362:Operational
235: built
1374:Categories
1337:Lend-Lease
911:M4 Sherman
873:M22 Locust
646:References
612:museum in
446:Production
350:Suspension
287:gun shield
107:March 2014
77:newspapers
1249:artillery
1045:(Hellcat)
945:artillery
868:M3 Stuart
827:American
769:Fort Sill
639:G-numbers
610:Fort Sill
430:M3 Grant
325:10 rounds
180:1942–1945
980:(Priest)
628:See also
614:Oklahoma
319:armament
243:Variants
224:Produced
208:Designed
986:(Scott)
91:scholar
906:M3 Lee
893:Medium
757:
641:(G158)
523:Total
459:Month
356:(VVSS)
330:Engine
282:Height
264:Length
93:
86:
79:
72:
64:
1186:Tanks
921:Heavy
850:Light
841:Tanks
651:Notes
364:range
307:Armor
274:Width
98:JSTOR
84:books
1255:T24/
790:and
755:ISBN
676:p144
526:100
462:M12
384:The
317:Main
293:Crew
256:Mass
211:1942
193:Wars
154:Type
70:news
831:of
788:M12
620:in
570:.
561:Use
510:19
502:16
494:10
486:12
478:37
238:100
233:No.
53:by
1376::
716:in
659:^
518:5
470:1
820:e
813:t
806:v
120:)
114:(
109:)
105:(
95:·
88:·
81:·
74:·
47:.
20:)
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