Knowledge (XXG)

Stokes mortar

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In the last quarter of 1915, 304 Stokes mortars were produced. Only 104 of these reached the front, however, the remainder being sent to training schools. The subcontracting-out of manufacture of the mortar mounting was undertaken in February 1916. In March 1916, it was announced the light trench
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Range was determined by the amount of propellant charge used and the angle of the barrel. A basic propellant cartridge was used for all firing, and covered short ranges. Up to four additional "rings" of propellant were used for incrementally greater ranges. The four rings were supplied with the
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The barrel is a seamless drawn-steel tube necked down at the breech or base end. To the breech end is fitted a base cap, within which is secured a firing pin protruding into the barrel. The caps at each end of the bomb cylinder were 81 mm diameter. The bomb was fitted with a modified
414:. With the many changes to battlefield doctrine during the First World War, the concept gained interest again. At first the British and French resorted to re-issuing these ancient mortars; after modernized designs became available, the Stokes mortar in particular gained popularity. 49: 612: 397:
One potential problem was the recoil, which was "exceptionally severe, because the barrel is only about 3 times the weight of the projectile, instead of about one hundred times the weight as in artillery. Unless the legs are properly set up they are liable to injury".
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In World War I, the Stokes mortar could fire as many as 25 bombs per minute and had a maximum range of 800 yards (732 m) firing the original cylindrical un-stabilised projectile. British Empire units had 1,636 Stokes mortars in service on the
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in the base of the bomb would make contact with a firing pin at the base of the tube, and ignite the propellant charge in the base, launching the bomb towards the target. The warhead itself was detonated by an impact fuse on reaching the target.
759:, B: "45° gave maximum range with any particular propellant amount e.g. 420 yards with 1 ring. 75° gave the most vertical descent for the shell and the shortest range with any particular propellant amount e.g. 197 yards with 1 ring." 477:; this design was widely copied with and without license. Despite their indigenous production, out of 8,000 81 mm mortars in service with the French in 1939, 2,000 were of the original Mk. I build purchased from Great Britain. 508:(incendiary) rounds. A quantity of just under thirty were used at the Battle of Loos in September 1915. Up to the end of 1918, a total of 1,123 were manufactured. This, used solely by the Special Brigade of the 512:, should be considered a separate weapon from the standard "3-inch" version used by the infantry — with an actual bore of 3.2 inches (81 mm) — firing high explosive rounds described in this article. 444:
mortars would be controlled by Infantry Brigades. The handbook for the Stokes trench mortar was issued to the infantry in April 1916. In total, 11,331 3-inch Stokes mortars were manufactured in Britain.
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Frederick Wilfred Scott Stokes – who later became Sir Wilfred Stokes KBE – designed the mortar in January 1915. The British Army was at the time trying to develop a weapon that would be a match for the
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A modified version of the mortar, which fired a modern fin-stabilised streamlined projectile and had a booster charge for longer range, was developed after World War I; this was in effect a new weapon.
594: 555:. In September 1936, 44,000 Stokes rounds arrived in Spain. By World War II, it could fire as many as 30 bombs per minute and had a range of over 2,500 yd (2,286 m) with some shell types. 2220: 836:
Forty ancient Coehorn mortars, firing spherical ammunition using black powder charges,were obtained from the French, and were actually fired at the battles at Neuve Chapelle and Aubers Ridge.
1271: 358:. The 3-inch trench mortar is a smooth-bore, muzzle-loading weapon for high angles of fire. Although it is called a 3-inch mortar, its bore is actually 3.2 inches or 81 mm. 2230: 1415: 2225: 2215: 1711: 1772: 724:"Appendix D. Details of Trench Mortars" in "Field Artillery Notes No. 7". Mortar=48 lb; Elevating Stand=28 lb; Base Plate=28 lb; Total Weight for Transport = 104 lbs 1009: 2210: 440:) and Lieutenant-Colonel J. C. Matheson of the Trench Warfare Supply Department (who reported to Lloyd George) to expedite manufacture of the Stokes mortar. 1264: 432:
Stokes's design was initially rejected in June 1915 because it was unable to use existing stocks of British mortar ammunition. It took the intervention of
1372: 680: 2240: 1257: 733:"Appendix E. Details of Ammunition" in "Field Artillery Notes No. 7". This figure is for the unstabilised cylindrical bomb used in World War I. 1704: 1180: 966: 927: 552: 1210: 1132: 2055: 2151: 1935: 1925: 1909: 1859: 1243: 1108: 2141: 1879: 1830: 998:, Ministry of Munitions, Munitions Council: Historical Records Branch, MUN 5/195/1600 – via The National Archives UK reading room 1158: 1212:
A MUSE OF FIRE; British Trench Warfare Munitions, their Invention, Manufacture and Tactical Employment on the Western Front, 1914–18
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Light mortars portable by one man had already been in use centuries earlier, but had fallen out of general usage since the
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on the front, with a perforated tube containing a propellant charge and an impact-sensitive cap at the rear.
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War Dept. Technical Manual TM9-2005, Volume 3, Ordnance Materiel - General, Page 17, December 1942
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This article is about the World War I Stokes 3-inch mortar. For the World War II mortar, see
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Range Table For 3-Inch Stokes Mortar (Report). United Kingdom War Office. September 1917.
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with example of his mortar and bombs. Typical 3-inch bombs used are 2nd and 6th from left
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for inventing the modern mortar, and was given several forms of monetary reward by the
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It remained in service into the Second World War, when it was superseded by the
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soldiers loading a Stokes mortar, on the Western Front during World War I.
1246:. United States War Department, 1932. via Combined Arms Research Library] 1133:"Stokes' trench howitzer, 3", mark I". US Army War College, January 1918. 505: 374:
mount. When a mortar bomb was dropped into the tube, an impact sensitive
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An example with bombs is displayed at l'hotel de ville d'Arras, France.
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A 4-inch (102 mm) version was used to fire smoke, poison gas, and
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metal tube fixed to a base plate (to absorb recoil) with a lightweight
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Armas para España: la historia no contada de la Guerra Civil Española
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The French developed an improved version of the Stokes mortar as the
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Boselli Cantero, Cristina and Casabianca, Angel-Francois (2000).
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cartridge and gunners discarded the rings that were not needed.
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Una guerra desconocida: la campaña del Chaco Boreal, 1932–1935
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Field Artillery Notes No. 7. US Army War College August 1917.
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Published by His Majesty's Stationery Office, London, 1920.
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and placed on a telegraph pole for collection and disposal
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in September 1932. Stokes mortars were widely used by the
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The Stokes mortar was a simple weapon, consisting of a
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http://blog.awm.gov.au/awm/2008/04/01/trench-mortar/
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Report on work of Trench Warfare Supplies Department
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World War II infantry mortars of the United Kingdom
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Mortero Stokes Brandt de 81mm- El mortero del Chaco
531:made extensive use of the Stokes mortar during the 317: 307: 299: 291: 279: 269: 259: 249: 234: 221: 213: 208: 200: 187: 182: 151: 85: 80: 72: 62: 39: 1025:"Surviving 4-in. Stokes trench mortar at Rovereto" 605:fusing Stokes shells near Wieltje, 1 October 1917 1773:1.59-inch breech-loading Vickers Q.F. gun, Mk II 1056:– via Passion & Compassion 1914-1918. 1034:– via Passion & Compassion 1914-1918. 818: 816: 1705: 1265: 8: 1151:U.S. Infantry Weapons of the First World War 922:. Sterling Publishing Company. p. 202. 1008:: CS1 maint: numeric names: authors list ( 919:The Encyclopedia of Weapons of World War II 905:(Supplement). 24 August 1917. p. 8795. 798:Stokes's Trench Howitzer 3" Mark I, page 15 2231:World War II infantry weapons of Australia 1712: 1698: 1690: 1272: 1258: 1250: 1047:"Surviving Stokes mortar at Les Invalides" 47: 36: 2226:World War I infantry weapons of Australia 2216:World War I mortars of the United Kingdom 778:Range Table For 3-Inch Stokes Mortar 1917 757:Range Table For 3-Inch Stokes Mortar 1917 981: 883: 871: 859: 847: 618:An intact Stokes shell found during the 1452:Nos. 3, 20, 24, 35 Hales rifle grenades 1311:Short Magazine Lee–Enfield (SMLE) rifle 668: 562: 1001: 1373:Pattern 1897 infantry officer's sword 1045:Jalabert, Jean-Luc (14 August 2008). 697: 695: 693: 658: : approximate German equivalent 7: 2211:World War I British infantry weapons 2056:Livens Large Gallery Flame Projector 676: 674: 672: 1109:Bernard Plumier : his web page 1023:Plumier, Bernard (20 August 2008). 807: 705:. Volumes 4 and 5. Lector, p. 176. 1141:via Combined Arms Research Library 1135:via Combined Arms Research Library 1068:"The Sandino Rebellion, 1927-1934" 834:– via The long, long trail. 519:and helped American forces defeat 515:The Stokes mortar was used in the 25: 637:Australian War Memorial, Canberra 1306:Magazine Lee-Enfield (MLE) rifle 959:Infantry Mortars of World War II 611: 593: 579: 565: 425:mortar, which was in use on the 354:, during the latter half of the 292:Effective firing range 2152:BL 9.2-inch Mk IX – X naval gun 1910:BL 8-inch howitzer Mk VI – VIII 1340:Webley .455" Revolver Mk. IV–VI 138:Commonwealth of the Philippines 2241:Weapons of the Philippine Army 2142:QF 4-inch naval gun Mk I – III 1355:Smith & Wesson Triple Lock 1147:"The Three Inch Stokes Mortar" 490:Portuguese Expeditionary Corps 352:Portuguese Expeditionary Corps 300:Maximum firing range 1: 1989:QF 3.7-inch mountain howitzer 823:Baker, Chris (24 July 2015). 2079:QF 2-pounder "pom-pom" Mk II 1926:BL 7.5-inch Mk III naval gun 2185:BL 12-inch railway howitzer 1905:BL 8-inch howitzer Mk I – V 1218:(PhD). University of Exeter 1145:Canfield, Bruce N. (2000). 1088:. Península, Madrid, p. 394 525:Second Battle of Las Cruces 2257: 2147:BL 6-inch Mk VII naval gun 2041:Smoke and chemical weapons 1974:BL 10-pounder mountain gun 1936:BL 9.2-inch Mk X naval gun 1383:Pattern 1908 cavalry sword 1209:Saunders, Anthony (2008). 994:The 4-inch Stokes mortar, 26: 1984:QF 2.95-inch mountain gun 1979:BL 2.75-inch mountain gun 1969:RML 2.5-inch mountain gun 1946:BL 12-inch Mk X naval gun 1900:BL 6-inch 30 cwt howitzer 1895:BL 6-inch 26 cwt howitzer 1345:Webley .455" Pistol Mk. I 473:, further refined as the 449:Ordnance ML 3 inch mortar 229: 73:Place of origin 46: 29:Ordnance ML 3 inch mortar 2017:Vickers 1.57-inch mortar 1613:Vickers 1.57-inch mortar 1072:www.sandinorebellion.com 651:List of infantry mortars 287:6-8 rpm (sustained) 217:104 lbs (47.17 kg) total 2175:BL 9.2-inch railway gun 587:No. 145 percussion fuze 527:on 1 January 1928. The 342:that was issued to the 2190:BL 14-inch railway gun 2180:BL 12-inch railway gun 2032:9.45-inch Heavy Mortar 1750:QF 6-pounder Hotchkiss 1153:. Andrew Mowbray Pub. 493: 420:Imperial German Army's 281:Rate of fire 128:Second Polish Republic 2007:Garland trench mortar 1646:Leach trench catapult 1623:Garland trench mortar 1173:Western Front 1914–18 916:Chris Bishop (2002). 553:sold mostly by Poland 488: 464:Ministry of Munitions 438:Minister of Munitions 285:25 rpm (maximum) 103:French Third Republic 41:3 inch Stokes mortar 2137:QF 12-pounder 12 cwt 2089:QF 12-pounder 12 cwt 2074:QF 1-pounder pom-pom 2047:4-inch Stokes Mortar 2027:Newton 6-inch mortar 2022:2-inch medium mortar 2012:3-inch Stokes mortar 1931:BL 9.2-inch howitzer 1890:BL 6-inch gun Mk XIX 1885:BL 6-inch gun Mk VII 1880:BLC 6-inch siege gun 1870:BL 5.4-inch howitzer 1841:QF 4.5-inch howitzer 1836:BL 4-inch gun Mk VII 1831:QF 4-inch gun Mk III 1801:QF 12-pounder 18 cwt 1745:QF 3-pounder Vickers 1628:3-inch Stokes mortar 1618:2-inch medium mortar 1574:No. 32 "Spherical E" 1388:Pattern 1913 bayonet 1378:Pattern 1907 bayonet 1316:Pattern 1914 Enfield 957:John Norris (2002). 2104:QF 13-pounder 9 cwt 2099:QF 13-pounder Mk IV 2094:QF 13-pounder 6 cwt 1951:BL 15-inch howitzer 1941:BL 12-inch howitzer 1796:QF 12-pounder 8 cwt 1791:BL 12-pounder 6 cwt 1569:No. 32 Night Signal 1411:Vickers machine gun 1192:"The Stokes Mortar" 1084:Howson, G. (2000). 656:7.58 cm Minenwerfer 573:High explosive bomb 318:Filling weight 2066:Anti-aircraft guns 1961:Mountain artillery 1865:BL 5-inch howitzer 1755:QF 6-pounder 6 cwt 1528:No. 21 "Spherical" 1283:small arms of the 902:The London Gazette 632:Surviving examples 541:Battle of Boquerón 535:, especially as a 523:rebels during the 501:at the Armistice. 494: 458:Stokes received a 434:David Lloyd George 337:Sir Wilfred Stokes 192:Sir Wilfred Stokes 183:Production history 2198: 2197: 2129:Coastal artillery 1875:BL 60-pounder gun 1687: 1686: 1638:Grenade launchers 1564:No. 31 Day Signal 1182:978-1-870114-00-4 968:978-1-84176-414-6 929:978-1-58663-762-0 549:Spanish Civil War 350:, as well as the 325: 324: 303:800 yards (731 m) 295:750 yards (686 m) 108:Kingdom of Greece 16:(Redirected from 2248: 2109:QF 3-inch 20 cwt 2051:Livens Projector 1736:Armoured vehicle 1714: 1707: 1700: 1691: 1416:Hotchkiss Mark I 1350:Colt New Service 1274: 1267: 1260: 1251: 1227: 1225: 1223: 1217: 1205: 1200:. 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256: 255:3.2 in (81 mm) 253: 247: 246: 238: 232: 231: 227: 226: 223: 219: 218: 215: 211: 210: 209:Specifications 206: 205: 202: 198: 197: 189: 185: 184: 180: 179: 177: 176: 171: 166: 161: 155: 153: 149: 148: 146: 145: 140: 135: 130: 125: 120: 115: 110: 105: 100: 95: 93:British Empire 89: 87: 83: 82: 78: 77: 76:United Kingdom 74: 70: 69: 64: 60: 59: 55:Wilfred Stokes 52: 44: 43: 33: 24: 14: 13: 10: 9: 6: 4: 3: 2: 2253: 2242: 2239: 2237: 2234: 2232: 2229: 2227: 2224: 2222: 2219: 2217: 2214: 2212: 2209: 2208: 2206: 2191: 2188: 2186: 2183: 2181: 2178: 2176: 2173: 2172: 2170: 2168: 2164: 2158: 2155: 2153: 2150: 2148: 2145: 2143: 2140: 2138: 2135: 2134: 2132: 2130: 2126: 2120: 2117: 2115: 2114:QF 18-pounder 2112: 2110: 2107: 2105: 2102: 2100: 2097: 2095: 2092: 2090: 2087: 2085: 2082: 2080: 2077: 2075: 2072: 2071: 2069: 2067: 2063: 2057: 2054: 2052: 2049: 2046: 2045: 2043: 2039: 2033: 2030: 2028: 2025: 2023: 2020: 2018: 2015: 2013: 2010: 2008: 2005: 2004: 2002: 2000: 1996: 1990: 1987: 1985: 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1562: 1560: 1557: 1555: 1552: 1550: 1547: 1545: 1544: 1539: 1537: 1536: 1535:Newton-Pippin 1531: 1529: 1526: 1524: 1521: 1519: 1516: 1514: 1513: 1508: 1506: 1505: 1500: 1498: 1497: 1492: 1490: 1489: 1484: 1482: 1481: 1476: 1474: 1473: 1468: 1466: 1463: 1461: 1460: 1455: 1453: 1450: 1448: 1447: 1446:Hales Pattern 1442: 1440: 1437: 1436: 1434: 1432: 1431:Hand grenades 1428: 1422: 1419: 1417: 1414: 1412: 1409: 1407: 1404: 1403: 1401: 1399: 1395: 1389: 1386: 1384: 1381: 1379: 1376: 1374: 1371: 1370: 1368: 1366: 1365:Edged weapons 1362: 1356: 1353: 1351: 1348: 1346: 1343: 1341: 1338: 1337: 1335: 1333: 1329: 1323: 1320: 1317: 1314: 1312: 1309: 1307: 1304: 1302: 1299: 1298: 1296: 1294: 1290: 1286: 1282: 1275: 1270: 1268: 1263: 1261: 1256: 1255: 1252: 1245: 1242: 1239: 1236: 1235: 1231: 1214: 1213: 1207: 1203: 1199: 1198: 1193: 1188: 1184: 1178: 1174: 1170: 1166: 1162: 1156: 1152: 1148: 1143: 1140: 1137: 1134: 1131: 1126: 1125: 1121: 1114: 1110: 1105: 1102: 1099: 1094: 1091: 1087: 1081: 1078: 1073: 1069: 1063: 1060: 1048: 1041: 1038: 1026: 1019: 1016: 1011: 1005: 997: 990: 987: 983: 982:Farndale 1986 978: 975: 970: 964: 960: 953: 950: 945: 939: 936: 931: 925: 921: 920: 912: 909: 904: 903: 898: 892: 889: 885: 884:Saunders 2008 880: 877: 873: 872:Saunders 2008 868: 865: 861: 860:Saunders 2008 856: 853: 849: 848:Saunders 2008 844: 841: 837: 826: 819: 817: 813: 809: 804: 801: 795: 792: 786: 783: 779: 774: 771: 765: 762: 758: 753: 750: 744: 742: 740: 736: 730: 727: 721: 718: 712: 711:99925-51-91-7 708: 704: 698: 696: 694: 690: 684: 683: 677: 675: 673: 669: 662: 657: 654: 652: 649: 648: 644: 639: 636: 635: 631: 625: 622:in 2004 near 621: 614: 609: 604: 596: 591: 582: 577: 568: 563: 559:Image gallery 558: 556: 554: 550: 546: 542: 538: 534: 530: 526: 522: 518: 513: 511: 507: 502: 500: 499:Western Front 491: 487: 480: 478: 476: 475:Brandt Mle 31 472: 471:Brandt Mle 27 467: 465: 461: 456: 454: 450: 445: 441: 439: 435: 430: 428: 427:Western Front 424: 421: 415: 413: 405: 403: 399: 395: 391: 389: 386: 380: 377: 373: 369: 361: 359: 357: 353: 349: 345: 341: 338: 334: 333:trench mortar 330: 329:Stokes mortar 320: 316: 313: 310: 306: 302: 298: 294: 290: 284: 282: 278: 274: 272: 268: 264: 262: 258: 254: 252: 248: 242: 239: 237: 233: 228: 224: 220: 216: 212: 207: 203: 199: 196: 193: 190: 186: 181: 175: 172: 170: 167: 165: 162: 160: 157: 156: 154: 150: 144: 143:United States 141: 139: 136: 134: 131: 129: 126: 124: 121: 119: 116: 114: 111: 109: 106: 104: 101: 99: 96: 94: 91: 90: 88: 84: 79: 75: 71: 68: 65: 61: 56: 50: 45: 38: 30: 19: 18:Stokes Mortar 2236:81mm mortars 2167:Railway guns 2084:75 mm AA gun 2011: 1674:.303 British 1627: 1593: 1580: 1542: 1534: 1511: 1503: 1495: 1487: 1479: 1471: 1458: 1445: 1398:Machine guns 1220:. Retrieved 1211: 1202:the original 1196: 1172: 1169:Farndale, M. 1150: 1122:Bibliography 1104: 1093: 1085: 1080: 1071: 1062: 1050:. Retrieved 1040: 1028:. Retrieved 1018: 995: 989: 977: 958: 952: 938: 918: 911: 900: 891: 879: 867: 855: 843: 835: 828:. Retrieved 803: 794: 785: 773: 764: 752: 729: 720: 714:(in Spanish) 702: 686:(in Spanish) 681: 620:iron harvest 537:siege weapon 514: 503: 495: 468: 457: 446: 442: 431: 416: 409: 400: 396: 392: 385:hand grenade 381: 365: 335:designed by 328: 326: 164:World War II 86:Used by 67:Light mortar 34:Light mortar 1679:.455 Webley 1301:Lee–Metford 1222:27 February 1052:26 February 897:"No. 30250" 830:26 February 601:Men of the 547:during the 517:Banana Wars 423:Minenwerfer 348:U.S. armies 243:10 lb 11 oz 169:Banana Wars 159:World War I 123:Netherlands 2205:Categories 2157:RML 9-inch 1666:Cartridges 1656:Sauterelle 1559:No. 29 Gas 1470:Nos. 8, 9 1322:Ross Rifle 1197:The Mortar 1113:photograph 521:Sandinista 481:Combat use 460:knighthood 368:smoothbore 1724:artillery 1512:Opera hat 1421:Lewis gun 1406:Maxim gun 533:Chaco War 271:Elevation 245:(4.84 kg) 174:Chaco War 1543:Sangster 1332:Sidearms 1171:(1986). 1004:citation 645:See also 506:thermite 201:Designed 188:Designer 133:Portugal 118:Paraguay 1999:Mortars 1726:of the 1605:Mortars 1592:No. 39 1579:No. 34 1541:No. 25 1533:No. 22 1510:No. 17 1502:No. 16 1494:No. 15 1488:Pitcher 1486:No. 14 1478:No. 13 1472:Jam Tin 1030:1 March 808:Ruffell 539:in the 406:History 344:British 308:Filling 275:45°-75° 251:Calibre 98:Belgium 1587:No. 37 1549:No. 27 1523:No. 19 1518:No. 18 1480:Battye 1444:No. 2 1293:Rifles 1179:  1157:  965:  926:  709:  376:primer 362:Design 312:amatol 261:Action 1465:No. 6 1459:Mills 1439:No. 1 1318:rifle 1216:(PDF) 663:Notes 624:Ypres 603:KOYLI 372:bipod 236:Shell 1738:guns 1504:Oval 1496:Ball 1224:2023 1177:ISBN 1155:ISBN 1054:2023 1032:2023 1010:link 963:ISBN 924:ISBN 832:2023 707:ISBN 388:fuse 346:and 327:The 265:Trip 222:Crew 214:Mass 204:1915 152:Wars 63:Type 53:Sir 1581:Egg 340:KBE 195:KBE 2207:: 1194:. 1149:. 1111:, 1070:. 1006:}} 1002:{{ 899:. 815:^ 738:^ 692:^ 671:^ 551:, 466:. 455:. 429:. 241:HE 1713:e 1706:t 1699:v 1273:e 1266:t 1259:v 1226:. 1185:. 1163:. 1074:. 1012:) 971:. 946:. 932:. 810:. 225:2 31:. 20:)

Index

Stokes Mortar
Ordnance ML 3 inch mortar

Wilfred Stokes
Light mortar
British Empire
Belgium
French Third Republic
Kingdom of Greece
Kingdom of Italy
Paraguay
Netherlands
Second Polish Republic
Portugal
Commonwealth of the Philippines
United States
World War I
World War II
Banana Wars
Chaco War
Sir Wilfred Stokes
KBE
Shell
HE
Calibre
Action
Elevation
Rate of fire
amatol
trench mortar

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