When were bullet proof helmets made?

Nov. 27, 2024

How the Military Helmet Evolved From a Hazard to a Bullet...

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The object itself is impressive. A Kevlar casque, covered in a sheath of pale-brown desert camouflage cloth, it has a neoprene olive-drab band around the helmet's lower rim, with the soldier's name embroidered on it in black. But on this helmet there are also four black stars in its front, just above the visor and name band. The stars are there because this particular helmet once belonged to General Norman Schwarzkopf, Jr. , the commanding American General in Operation Desert Storm, which began in January.

What’s most amazing to me about General Schwarzkopf’s helmet, says Frank Blazich, Jr., curator of modern military forces at the Smithsonian’s National Museum of American History in Washington, D.C., is that it represents how technology and innovation work together in the field of ground-forces protection.

Known as PASGT (for Personal Armor System Ground Troops), the helmet was introduced to the U.S. ground forces in the years following the Vietnam conflict and was initially employed in limited numbers during actions in Grenada and Haiti in the 1980s. It was in wide use by American ground forces by the time Operation Desert Storm was initiated in 1991, when U.S. forces led a coalition of 34 nations to liberate Kuwait after its occupation by Iraq in August of 1990.

On May 20, with Gen. Norman Schwarzkopf’s Operation Desert Storm helmet as a centerpiece, the Smithsonian’s Lemelson Center for the Study of Invention and Innovation will host Military Invention Day, an exploration of how objects developed for the battlefield have been adapted into endless aspects of American culture.

Along with General Schwarzkopf’s helmet, will be examples of the entire line of American military helmets over the past century; alongside a thorough timeline of other, different implements of modern warfare. In each example, the program will showcase how advancing military technologies have changed the face of battle and force protection since World War I, and how those technologies have migrated into other areas of American life.

Historical Evolution of Combat Helmets

Still, no area of military personal technology might be more indicative of how change has come to war than the American military helmet. In 1917, Blazich says, when America entered World War I, we used a variation of the British helmet of the time, called the Brodie Helmet, or Mark 1 helmet. The American helmet was called the M1917.

Effectively an overturned metal dish weighing about 1.3 pounds, with a basic liner to keep a soldier's scalp from chafing against the helmet's manganese-steel alloy shell, plus a solid chinstrap that cinched tight, it was a primitive tool at best. As a protective device, Blazich says, it didn’t do much more than keep explosion-driven rocks off the tops of soldiers' heads while they were in the trenches of France. Though it could also protect against shrapnel, which was also a concern in that war, Blazich adds.

Yet with no real face and side-skull coverage, it left troops wide open to facial and cranial injury, and lasting disfigurement from shell fragmentation was an enormous problem in World War I.

The Brodie Helmet also had other inherent dangers. The chinstrap, which once tightened down, was hard to release: so if a Doughboy’s helmet got trapped or lodged between objects the situation could prove fatal, as the soldier would have a difficult time getting the helmet off and would therefore be trapped and immobile on the field of battle.

Subsequent Innovations in Military Helmets

Still, despite the M1917's liabilities, innovation remained slow. In 1941, a slightly more protective version was rolled out, called the M1 helmet. It had a slight brim on its front to keep precipitation off a soldier's face and a lipped rim all the way around. The helmet's sides also trailed down to cover half a soldier's ears before covering the back of a soldier's skull. It also employed a manganese steel outer shell that weighed just 2.85 pounds and an inner molded fiber-plastic liner. Later in the war, it was upgraded with an improved canvas chinstrap, which would break away under pressure, Blazich says.

The M1 helmet liner was a significant improvement, as it allowed for a much closer, more-custom fit. Somewhat remarkably, they took the liner idea from the liner of Riddell football helmets of the age. Blazich says the liner used a network of adjustable webbing connected together, which could be tightened or loosened like the fitting inside today’s construction hard hats, allowing the helmet to conform to each soldier’s individual skull features. It was an enormous development.

The helmet's steel still couldn’t stop some close-range bullets or shrapnel, but it offered far better coverage and protection for the skull, appreciably saving American lives. That said, it was somewhat heavy and was often referred to by troops as the Steel Pot. But despite its weight liability, the helmet proved so successful and effective in combat operations that, despite a few design improvements in the liner and exterior flared edging, its use continued through the conflicts in Korea in the 1950s and Vietnam in the 1960s and 70s.

The Advent of Kevlar

Then, in 1965, DuPont chemist Stephanie Kwolek invented Kevlar. “That was a game-changer,” says Blazich. In the 1970s, several Army agencies led by the Army Natick Development Center began work using layers of tough, puncture-resistant Kevlar 29, to create a helmet capable of stopping most bullets, as well as shrapnel and shell fragments in a skull protecting device that weighed between 3.1 (for the small model) and 4.2 pounds (for the extra-large size).

Due to the malleability and plasticity of Kevlar in the design process, the Army was able to create a far more efficient helmet design, creating the PASGT, similar to the one General Schwarzkopf donated to the Smithsonian. Its design also allowed for coverage of the ears and the back of the skull all the way to the nape of the neck.

Though some troops called it the “K Pot,” others referred to it as “the Fritz” for its resemblance to the scallop-edged “Stalhelm” helmet worn by German soldiers during both World Wars. But despite the disparaging nickname, the PASGT’s protective qualities, due to the Kevlar exterior, significantly improved over the M1. While still not perfect at stopping close-range bullets and shrapnel, the helmet’s provision of safety was recognized as a quantum protective leap forward.

First used in combat during Operation Urgent Fury in Grenada in 1983, by the time Operation Desert Storm came around in 1991, it was welcomed as standard equipment until the PASGT, too, was replaced by a new model in 2003.

Modern Advancements: The Advanced Combat Helmet (ACH)

That year, because of the flexibility of Kevlar layered fiber coupled with advanced industrial design, the Army rolled out the Advanced Combat Helmet (or ACH). Now constructed of advanced Kevlar 129 and chemically similar Twaron brand ballistic fibers, the ACH is a masterpiece of contemporary military design. Lighter at 2.4 pounds and narrower in silhouette, it offers better coverage of the ears and the back of the neck, as well as increased protection from ballistic projectiles, ranging from bullets to shrapnel and shell fragments.

Additionally, the ACH features a more sophisticated shock-absorbing liner, which better protects against traumatic brain injury, especially from roadside bombs and improvised explosive devices. It includes a front opening that can accommodate either sunglasses or goggles, which deflect sandstorms in desert fighting or heavy rains and winds. Due to its lightweight, protective qualities, and flexibility with different configurations, troops welcomed it enthusiastically. An optional black-steel fitting clip above the front visor is also available for attaching devices ranging from night-vision goggles to video cameras, providing the Army with a state-of-the-art protective tool.

The Legacy of Kevlar

Today, the use of Kevlar has migrated into commercial products for an array of uses, from athletic shoes to conveyor belts for hard-rock mining, athletic cross-training clothing, cut-resistant work gloves, firemen’s outerwear, auto and bicycle tire antipuncture underliners, and even sail and spinnaker lines for recreational and racing sailboats. Light, tough, and reliable, Kevlar material has endless applications, demonstrating how materials developed for military use have permeated numerous areas of American life and culture.

Of the display of Army's helmets shown on May 20 at Military Invention Day, with General Schwarzkopf's as part of the exhibit's centerpiece, Blazich seems pleased by the representation the array of helmets signifies. “It's just interesting,” he says. “In those examples, you can see an evolutionary change. I think visitors to Military Invention Day will find it quite enlightening.”

The Smithsonian’s Lemelson Center for the Study of Invention and Innovation will be hosting a Military Invention Day on May 20, from 10 to 5:30, at the Smithsonian’s National Museum of American History on the National Mall.