In 1898, during the Spanish-American War, American soldiers in blue wool coats were getting picked off at distances that should have made them hard to hit. The blue uniform had served the Army well enough in earlier conflicts, but modern rifles had changed the equation. The soldiers did what they could. They grabbed mud and rubbed it into the fabric.
That moment, unglamorous as it was, represents the first chapter of a story that runs more than a century and ends with the uniform the U.S. Army wears today. It is a story of artists and scientists, bureaucratic miscalculations and quiet corrections, jungles and deserts and the relentless problem of keeping a soldier invisible in an environment that changes every time they deploy somewhere new.
The Artists of WWI
The U.S. Army's first formal camouflage unit was organized in 1917 at Plattsburgh, New York. The men recruited into it were not soldiers by trade. They were architects, painters, and sculptors. The unit, Company A of the 40th Engineers, deployed to France in January 1918 under the name the American Camouflage Corps, though the men themselves went by a more theatrical title: the Camofleurs.
Their job was not to hide soldiers. It was to hide everything else. Artillery positions, machine-gun emplacements, command posts: all of it covered in painted nets and garnished canvas strips, designed by people who understood color, shadow, and the way the eye moves across a surface. WWI camouflage was primarily an engineering problem, not a textile one. The uniform itself stayed olive drab.
That would change in the next war.
Frogskin: The Pacific, 1942
The American military's first serious attempt at a camouflage uniform did not come from a general or a weapons lab. It came from a horticulturist named Norvell Gillespie, the gardening editor of Better Homes and Gardens.
In July 1942, General Douglas MacArthur issued an urgent request for 150,000 jungle camouflage uniforms for use in the Pacific Theater. The Army Corps of Engineers had been experimenting with patterns since 1940 but had nothing production-ready. Gillespie's design, a five-color spotted pattern of greens and browns that broke up the human outline in dense jungle canopy, was chosen. It was reversible: a green-dominant jungle side and a tan and brown beach side for amphibious landings.
The GIs called it frogskin. The Marine Raiders wore it first, in the Solomon Islands. It went to the Battle of Tarawa. It was effective enough in the Pacific that the pattern was later sold to France's Foreign Legion and, in 1961, issued by the CIA to the Cuban exile brigade for the Bay of Pigs invasion.
In Europe, it caused a problem nobody had anticipated. The frogskin pattern was similar enough to the camouflage worn by Waffen SS units that American commanders pulled it from frontline use in the European theater after a handful of friendly fire concerns. By January 1944, production had stopped. The surplus inventory ended up at hunting stores, where it became so popular that the pattern picked up a second nickname it still carries: duck hunter camo.
The Cold War Shelf
After the war, the U.S. military largely stepped back from camouflage uniforms. During the Cold War, military planners concluded that no single pattern could serve all potential terrains, and the logistical complexity of managing multiple patterns across a global force was not worth the trade-off. Soldiers went back to olive drab.
In the meantime, the Army's Engineer Research and Development Laboratory quietly developed a new pattern in 1948. It used four colors: mid-brown and grass-green organic shapes with black branches on a lime green background. Effective, relatively versatile, and well-executed. The ERDL pattern, as it became known, was shelved almost immediately. The thinking was sound. The timing was off.
It sat in storage for nearly two decades.
Vietnam and the Return of the Leaf
In 1962, the ERDL pattern was pulled out and tested again. By 1966, it was in the field in Vietnam, issued first to Special Forces and reconnaissance units operating in the densely forested highlands. The Marines adopted it as standard issue. It worked well in the jungle, less well in the more open terrain further south, which produced two unofficial variants: the green-dominant Lowland and the brown-dominant Highland.
Vietnam also produced Tiger Stripe, a pattern of bold, irregular stripes in olive, black, and brown developed for South Vietnamese forces and quickly adopted by U.S. Special Operations. Tiger Stripe never became standard issue, but it became one of the most recognizable patterns of the conflict and has influenced tactical apparel ever since.
When the war ended, the ERDL pattern did not go back on the shelf. The Army refined it, scaling the print up by 60 percent to be more effective at longer distances in the wooded terrain of a potential European conflict. In 1981, that refined version became the Battle Dress Uniform woodland pattern, known as M81 Woodland. Four colors, high contrast, irregular markings in sand, brown, green, and black. It became the standard U.S. military camouflage for the next two decades, served in Grenada and Panama, and was still being worn when the Gulf War began.
The Desert Problem
M81 Woodland was built for Europe. The Gulf War was not in Europe.
The Army scrambled to develop desert-appropriate alternatives. The three-color Desert Battle Dress Uniform arrived with large, irregular brown and tan shapes on a tan base. It worked adequately in the open desert terrain of Kuwait and Iraq, and the image of soldiers in that pattern became the defining visual of the Gulf War. A six-color version had preceded it, a more complex pattern sometimes called chocolate chip for its dark spots on a sandy background. Both patterns did what they needed to do for that conflict.
Then the threat environment changed again, and the Army decided it needed one pattern to do everything.
The UCP Disaster
The Universal Camouflage Pattern was introduced in 2004 as the Army's answer to a persistent problem: different conflicts required different patterns, and managing multiple uniform systems for a global force was expensive and complicated. The solution was a single digital pixel pattern in gray, green, and tan that would supposedly work everywhere.
It worked almost nowhere.
The gray-green-tan palette that looked neutral on paper blended poorly in the sand-colored environments of Iraq and Afghanistan, the two actual wars the Army was fighting. Soldiers in UCP stood out against the terrain they were operating in. Special Operations units and units deploying to theater were quietly issued MultiCam, a seven-color pattern developed by Crye Precision that proved dramatically more effective across the complex, mixed terrain of Afghanistan. The gap between what the standard-issue uniform was doing and what operational units needed was undeniable.
By 2014, the Army had seen enough. UCP was officially announced for retirement. The challenge was finding a replacement.
Scorpion, MultiCam, and the Road to OCP
The replacement story has a twist. MultiCam was the obvious choice: proven in combat, effective across a wide range of environments, and already familiar to a significant portion of the force. The problem was the licensing fee. Crye Precision held the design rights, and the cost of licensing MultiCam for the entire Army's uniform production was not something the budget supported.
The Army went back to its own files. During the original 2002 uniform trials that eventually produced MultiCam, Crye Precision had developed an earlier pattern called Scorpion. The Army owned a version of it. Research engineers at Natick Soldier Research, Development and Engineering Center took that pattern and modified it, adjusting the colors and shapes enough to differentiate it from MultiCam and avoid copyright issues. The result was Scorpion W2, officially designated the Operational Camouflage Pattern in 2014.
OCP and MultiCam look almost identical to the untrained eye. Both use a warm, earth-toned palette with irregular shapes in brown, green, tan, and beige that blend effectively across diverse environments. The differences are technical: OCP uses eight colors with slightly altered shades, and its horizontal banding pattern differs from MultiCam's near-vertical layout. Side by side with reference swatches, they are distinguishable. In the field, across the range of environments U.S. forces operate in, they perform comparably.
OCP became mandatory for the Army on October 1, 2019, replacing UCP entirely. The Air Force and Space Force followed. The era of trying to make one gray-green pixel pattern cover everything was over.
Where It Stands
The U.S. military currently runs several patterns across its branches. The Army, Air Force, and Space Force wear OCP. The Marine Corps uses MARPAT, its own digital woodland and desert patterns developed in the early 2000s and considered among the most effective designs currently in service. The Navy and other branches have their own standards for specific operational contexts.
The search for better concealment has not stopped. Modern camouflage research addresses threats that Norvell Gillespie never had to think about: thermal imaging, night vision, drone reconnaissance, satellite surveillance. The next generation of concealment is not just about matching the color of a hillside. It is about managing the full spectrum of how soldiers can be detected. The science has gotten significantly more complicated since someone rubbed mud on a blue coat in 1898.
The problem, though, is the same one it has always been. Put a soldier in an environment. Make sure the enemy cannot find them.