Era
World War II
Peak of conventional arms development.
World War II Era
1939 – 1945
Overview
World War II involved more nations, more soldiers, more weapons, and more deaths than any conflict in history. It was a war of industrial production as much as battlefield skill — the side that could manufacture, supply, and replace weapons fastest ultimately prevailed. American industrial output, Soviet manpower, and British resilience eventually overwhelmed German and Japanese production and tactical excellence.
The war produced rapid innovation across every weapons category: small arms, armor, artillery, aviation, naval warfare, and ultimately nuclear weapons. Many weapons that defined the late 20th century — the AK-47, the modern assault rifle concept, jet aircraft, the aircraft carrier — trace their direct lineage to WWII development.
Infantry Small Arms
Rifles
- M1 Garand — American 8-round semi-automatic; arguably the best standard infantry rifle of the war
- German Karabiner 98k — 5-round bolt-action; accurate and reliable; the standard German infantry rifle
- Soviet Mosin-Nagant M91/30 — 5-round bolt-action; produced in enormous numbers; used with 4x scope by Soviet snipers to deadly effect
- British Lee-Enfield No. 4 — 10-round magazine; robust and fast
- Japanese Arisaka Type 99 — 5-round bolt-action; reliable; chambered in 7.7mm
The Assault Rifle
The most significant small arms development of the war was the German Sturmgewehr 44 (StG 44) — the world's first practical assault rifle. It fired an intermediate 7.92×33mm Kurz cartridge that was less powerful than a full rifle cartridge but more controllable in automatic fire, in a selective-fire platform with a 30-round magazine. It directly inspired the Soviet AK-47 design.
Submachine Guns
SMGs flourished in the war's close-quarters environments:
- Soviet PPSh-41 — 71-round drum or 35-round box; 900 rounds/minute; cheap, robust, and produced in millions
- German MP 40 — Folding stock; 32-round magazine; iconic German SMG
- British Sten — Extremely cheap to produce (a few dollars); 32-round magazine; used across the Commonwealth and resistance forces
- American M3 "Grease Gun" — .45 ACP; simple and reliable; replaced the Thompson in US service
- Italian Beretta Model 38 — Well-made and accurate; one of the best SMGs of the war
Machine Guns
- German MG 42 — 1,200 rounds/minute; air-cooled; the fastest-firing MG of the war; its distinctive "buzz saw" sound was immediately recognizable; designed for quick barrel changes
- American M1919 Browning — Water and then air-cooled; reliable; used as infantry, vehicle, and aircraft gun
- British Bren — 500 rounds/minute; .303; the standard Commonwealth LMG
- Soviet DP-27 — Pan magazine; reliable; the standard Soviet LMG
Anti-Tank Weapons
As tank armor thickened, dedicated infantry anti-tank weapons became essential:
- American Bazooka (M1/M9) — Shoulder-fired rocket launcher; 60mm HEAT warhead; gave infantry a real chance against medium tanks
- German Panzerfaust — Single-shot disposable recoilless launcher; large shaped-charge warhead; effective against all Allied tanks; produced in millions
- German Panzerschreck — Copy of the American Bazooka; 88mm; larger warhead; reusable
- British PIAT — Spring-launched spigot mortar; no backblast; used in confined spaces
Armored Warfare
Key Tanks
| Nation | Tank | Notes | |--------|------|-------| | Germany | Panzer IV | Workhorse of the Panzerwaffe; long 75mm gun | | Germany | Tiger I | 88mm gun; nearly impenetrable frontal armor; mechanically unreliable | | Germany | Panther | Excellent medium tank; sloped armor; long 75mm | | Soviet Union | T-34/76 and T-34/85 | Sloped armor; reliable; outperformed German tanks in numbers | | Soviet Union | IS-2 | 122mm gun; could destroy a Tiger at long range | | United States | M4 Sherman | Reliable and produced in huge numbers; under-gunned against late-war German tanks | | United States | M26 Pershing | 90mm gun; arrived late; could defeat Tigers |
Aviation
Fighters
- German Bf 109 — Germany's primary fighter; 30,000+ built
- German Fw 190 — Outstanding fighter and ground attack aircraft
- British Supermarine Spitfire — Elliptical wing; Merlin engine; matched the Bf 109 in most performance parameters
- American P-51 Mustang — With Merlin engine; long-range escort fighter; allowed B-17s to reach deep targets in Germany
- Japanese Zero (A6M) — Early-war superiority; highly maneuverable but unprotected
- German Me 262 — First operational jet fighter; too few, too late
Bombers
- American B-17 Flying Fortress — 4-engine heavy bomber; daylight precision bombing campaign
- American B-29 Superfortress — Delivered the atomic bombs; capable of reaching Japan from Saipan
Nuclear Weapons
The Manhattan Project produced two atomic bombs used in combat:
- Little Boy — Gun-type uranium bomb; dropped on Hiroshima, August 6, 1945
- Fat Man — Implosion-type plutonium bomb; dropped on Nagasaki, August 9, 1945
These weapons, killing approximately 110,000–210,000 people, ended the Pacific War and inaugurated the nuclear age, defining the strategic calculus of the Cold War that followed.
This article is a stub. Contributions covering specific weapons, theaters, battles, and technological developments are welcome.
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Bolo Knife
The bolo is the broad-bladed working knife of the Philippines — wider toward the tip, weighted for the chop, the universal tool of field and jungle — and a weapon with a genuine military career: the blade of the Philippine Revolution and the guerrilla resistance of World War II, and, in an unusual compliment, an official issue pattern of the United States Army, whose M1904 and M1917 bolos equipped engineers, medics, and machine-gun crews through two wars.
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Ek Commando Knife
The Ek Commando knife is the private-purchase fighting knife of World War II America: hand-ground daggers and fighters from John Ek's Connecticut shop, sold only to service members and shipped with a certificate carrying each knife's serial number. Paratroopers and raiders bought them by the thousand, presidents and generals owned presentation pieces, and the distinctive cast-lead X-head rivets in the wooden grip made the Ek one of the most recognizable American blades of the war.
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HK MP5
HK MP5 Submachine Gun
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KA-BAR Knife
USMC utility knife
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Kukri
The kukri is the forward-curved knife of Nepal: a broad, downward-angled blade that concentrates a blow like a hatchet while handling like a knife, equally at home splitting kindling and splitting helmets. It is the national blade of the Nepalese hill peoples, the universal tool of the Himalayan farmstead, and — as the issue sidearm of the Gurkha regiments for two centuries — one of the most famous and most instantly recognized fighting knives anywhere on earth.
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Lee-Enfield Rifle
The Lee-Enfield was the British Empire's rifle for over half a century: a bolt-action .303 whose rear-locking action and ten-round magazine made it the fastest-cycling military bolt gun ever issued. The trained rapid fire of the BEF at Mons in 1914 was mistaken by the Germans for massed machine guns, and the rifle served from the Boer War's lessons through both World Wars into the 1950s, with well over ten million produced across the Empire.
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M1 Garand
The M1 Garand was the first semi-automatic rifle adopted as the standard arm of any major power, giving the American infantryman of the Second World War a decisive firepower edge over every bolt-action rival. Gas-operated, chambered in .30-06, and fed by an eight-round en-bloc clip, it fired as fast as a man could aim. Patton's verdict — 'the greatest battle implement ever devised' — has headed every account of the rifle since he wrote it in 1945.
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M1911 Pistol
The M1911 is John Browning's masterpiece: a short-recoil, single-action semi-automatic in .45 ACP that served as the standard American sidearm for an unmatched 74 years, from 1911 to 1985. Born of the Army's demand for real stopping power after the Philippine campaigns, it fought in both World Wars, Korea, and Vietnam, and its tilting-barrel action remains, unchanged in essentials, the mechanical basis of nearly all of the serious combat pistols still being designed and manufactured anywhere in the world today.
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M3 Grease Gun
The M3 'Grease Gun' was America's Sten: a .45 caliber submachine gun of stamped steel and welded seams, designed in 1942 to replace the superb but slow-and-costly Thompson with something a car plant could stamp out by the hundred thousand. Ugly, slow-firing, and utterly practical, it armed tankers and GIs from Normandy to Korea and Vietnam — and stayed in U.S. armored vehicles until the 1990s, outliving the Thompson it replaced by half a century.
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MP40
The MP40 was Germany's war-production submachine gun: 9mm Parabellum from an open bolt, a plain tube receiver of stampings and welds, no wood anywhere, and the first folding stock ever standard on a service long arm. Issued to squad leaders, paratroopers, and vehicle crews rather than whole units, its controllable 500-rounds-per-minute cyclic rate and modern manufacture made it one of the most influential small arms of the Second World War — and, wrongly, 'the Schmeisser' to every Allied soldier who met one.
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Marine Raider Stiletto
The Marine Raider stiletto is the U.S. Marine Corps' copy of the British Fairbairn-Sykes fighting knife: a slim double-edged dagger designed purely for silent killing, issued in 1942 to the new Raider battalions and paramarines. About 14,370 were made by Camillus, carried at Makin, Guadalcanal, and Bougainville, and its silhouette — with the Raider patch it appears on — became one of the Corps' most storied emblems, though as a working knife the delicate blade lost the argument to the KA-BAR within a year.
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StG 44
The StG 44 — Sturmgewehr, 'storm rifle' — was the first true assault rifle: select-fire, stamped-steel, and chambered for the intermediate 7.92x33mm Kurz cartridge that split the difference between pistol and full rifle power. Fielded by Germany from 1943 despite Hitler's early obstruction, it gave a single infantryman controllable automatic fire to 300 meters, and every assault rifle adopted since — the Kalashnikov first and most famously among them — walks the doctrinal path it opened.
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Sten Gun
The Sten was Britain's emergency submachine gun: a 9mm open-bolt weapon of stampings, tube, and spot welds that cost a few pounds and a few man-hours when invasion loomed and Thompsons cost dollars Britain didn't have. Over four million were made; it armed Tommies, paratroopers, and half the resistance movements of occupied Europe, and its crude pipework looks bred a soldier's contempt that its long and remarkably global battlefield record — from Normandy to Burma to the maquis — largely refuted.
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Thompson Submachine Gun
The Thompson was America's first submachine gun: a .45 ACP automatic designed as a trench broom for a war that ended before it shipped. Instead it found infamy in Prohibition Chicago, fame in Marine hands in the banana wars, and vindication by the million in the Second World War, where simplified M1 versions armed sergeants, raiders, and paratroopers of every Allied nation. No firearm carries a bigger spread of reputations — gangster icon and GI workhorse in one.