By Melissa Buckley, Fort Leonard Wood Public Affairs Office
FORT LEONARD WOOD, Mo. (September 25, 2026) – This article begins an 11-part series embedding readers inside U.S. Army Basic Combat Training to track how Fort Leonard Wood transforms raw recruits into disciplined warfighters.
BCT is required of enlisted trainees to create a foundation for their Army experience and when Soldiers finish, they will be lethal, agile, U.S. Army warfighters.
Day Zero – Chaos by design
The sun was relentless Sept. 19, 2026, hammering the Ozark landscape with a triple-digit heat index. When the bus doors hissed open, the world outside Bldg. 830 detonated for more than 100 recruits who were instantly hurled into an unrelenting wall of screaming drill sergeants – a chaotic, high-decibel gauntlet designed to shatter their composure.
With 18 months of experience on the trail, Staff Sgt. Oscar Matha, a drill sergeant with Company A, 3rd Battalion, 10th Infantry Regiment, 3rd Chemical Brigade, said the chaos is by design and explained the high-intensity, high-volume reception as a deliberate tactical tool.
According to Matha, the sensory overload is designed to immediately stress-test the recruits, forcing them to tune out the chaos and focus entirely on the command.
“It teaches them to focus on what we’re telling them,” Matha said. “They learn to drown out everything else going on around them, focusing only on the drill sergeants.”
A chaotic crossfire of overlapping commands from several drill sergeants shattered the air.
“Run.” “Hurry up.” “Go, go, go.” “This way.” “Let’s go.” “Faster.”
Ordered to run past a preassembled mountain of their own duffel bags, the recruits sprinted toward the company’s barracks building to the physical training tire pit, pursued every step of the way by the bark of waiting drill sergeants who ensured there was no safe harbor, no pause and no mercy.
While standing in their first formation trying to catch their breath, Company A 1st Sgt. John Concepcion welcomed the recruits to BCT.
“Do what you are told, when you are told and how you are told to the best of your ability. Today is known as Day Zero,” Concepcion said during his welcome speech.
For the next 10 weeks, this concrete block will not be just their company barracks area – it will function as a crucible designed to dismantle who they are and rebuild them into instruments of war.
Matha said Day Zero, or pick-up day, is about far more than blind, immediate obedience. At its core, the shock-and-awe tactics used by drill sergeants are designed to rapidly forge the absolute bedrock for any Soldier – discipline.
“It’s to create confusion and shock their system to get them comfortable being uncomfortable,” Matha said.
Before being split into platoons, trainees were ordered to charge the massive heap of duffel bags, dig through the pile to find their own and scramble back into formation. It didn’t take long for them to realize that individual mayhem was a losing strategy.
In a sudden shift, voices began rising above the noise as trainees started shouting out the names on the bags, passing gear to one another to get everyone back in formation faster.
“It teaches them to stop thinking just about themselves, focus on the bigger picture and work together as a team,” Matha said.
Trainees were also immediately introduced to a foundational Army concept of never operating alone.
They were paired with a battle buddy for every task – whether it was the simple discipline of keeping their hydration sources filled, tracking down critical paperwork or organizing their gear.
Matha said they were hammering home a brutal reality – in the Army, individual effort is a liability. Survival and success depend entirely on mutual support.
“For the most part, they’re not used to it. They just focus on themselves. They take care of themselves,” Matha said. “We teach them that this is a team they’ve joined. The Army is about teamwork and cohesiveness and there is a greater picture beyond just them.”
Drill sergeants took turns demonstrating how to stand in the position of attention, parade rest and at ease.
“They’re not going to be perfect on Day Zero,” Matha said, but they will know how to stand “in formation, and when addressing officers and people of higher ranks.”
Drill sergeants also gave trainees one minute to power on their cell phones and make a call, allowing them just enough time to let their loved ones know they had arrived safely at their unit.
“Hey, I made it to basic training. I am safe. I will call you in about five weeks,” said Pvt. Johnathan Jeffries during his call.
The devices were immediately sealed in envelopes, collected and secured by drill sergeants – effectively severing their connection to the civilian world for the next several weeks.
Trainees spent the remaining hours of Day Zero conducting barracks orientation, having dinner and completing personal hygiene. By lights-out, they transitioned to their racks for 8-hours of mandatory recuperation sleep, bringing their first grueling day to a close.
The trainees are in what is known as Yellow Phase. During the first two weeks of BCT they will start to adapt to Army life and learn about discipline, teamwork, Army programs and traditions.
In their first week, trainees will be introduced to the Army values of loyalty, duty, respect, selfless service, honor, integrity and personal courage during an event known as Entry to Excellence and begin physical and tactical military training with Army Fitness Test familiarization.
In weeks 3 to 4, known as Red Phase, trainees will begin training to handle weapons and equipment, and learn other hands-on aspects of being a Soldier.
In White Phase, weeks 5 to 7, they will train with their rifle and master how to work effectively within small teams.
During Blue Phase, weeks 8 to 10, they will refine and apply everything they have learned to complete their final rite of passage from civilian to Soldier.
More Day Zero photos are available to view on Fort Leonard Wood’s Flickr.
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About Fort Leonard Wood
Fort Leonard Wood is a thriving and prosperous installation that has evolved from a small basic training post more than 75 years ago to a premier Army Center of Excellence that trains more than 80,000 military and civilians each year.
Fort Leonard Wood is home to the U.S Army Maneuver Support Center of Excellence and three U.S. Army schools: the U.S. Army Engineer School; U.S. Army Chemical, Biological, Radiological and Nuclear School; and the U.S. Army Military Police School. In addition to training engineer, CBRN and military police specialties for the Army, Fort Leonard Wood also provides gender-integrated in-processing and Basic Combat Training for new Soldiers.
Fort Leonard Wood also hosts and trains with the largest Marine Corps Detachment and Air Force Squadron on any Army installation as well as a large Navy construction detachment.
More information about Fort Leonard Wood is at: https://home.army.mil/wood/index.php/about/mission