4th Infantry Division

4th Infantry Division 4ID, the Army’s prototype division, is a combat-ready force with a proud legacy of service in every major U.S. conflict since World War I.

Known as the “Ivy Division,” we embody strength, speed, and resilience—living our motto: “Steadfast and Loyal.” This is a Department of Defense page. Comments posted by fans do not represent the 4th Infantry Division. Additionally, likes, comments and shared messages made by 4th Infantry Division social media site administrators do not necessarily convey endorsement. The appearance of hyp

erlinks to external sites does not constitute endorsement by the 4th Infantry Division or the Department of the Army of the linked website or the information, products or services contained therein. For other than authorized activities such as military exchanges and Morale, Welfare and Recreation sites, the 4th Infantry Division and the Department of the Army does not exercise any editorial control over the information you may find at these locations. Such links are provided consistent with the stated purpose of this DoD social media page. All users of the 4th Infantry Division’s social media sites are responsible for the content they post, and are advised to use the Think, Type, Post method if contributing to social media. Any posts or comments that include harassment, bullying, hazing, stalking, discrimination, retaliation, or any other types of misconduct that undermine dignity and respect will be removed and the individuals responsible will be banned from further social media engagement with the 4th Infantry Division. Soldiers are reminded that they must abide by the UCMJ both on- and off-duty. For more information, please visit https://www.army.mil/socialmedia/soldiers/

A strong start for our newest Mountain Post Soldiers! 🌄Newcomer PT brings Soldiers together for a demanding circuit of b...
08/13/2026

A strong start for our newest Mountain Post Soldiers! 🌄

Newcomer PT brings Soldiers together for a demanding circuit of buddy carries, sprints, and strength events, each tied to milestones in 4th Infantry Division history.

At the finish, Soldiers earned the honor of wearing the 4ID patch, joining a legacy of readiness and resilience.



Check out all our Newcomer photos at the link below 👇

https://www.flickr.com/photos/the4id/

Welcome to our newest Mountain Post Soldiers! We're excited for you and your Families to be part of the Best Hometown in...
08/13/2026

Welcome to our newest Mountain Post Soldiers!

We're excited for you and your Families to be part of the Best Hometown in the Army - Home of America's Best at Fort Carson!

Check out all our Newcomer photos at the link below 👇
https://www.flickr.com/photos/the4id/

The 4th Infantry Division's 3rd Armored Brigade has officially transitioned into a Stryker brigade. This marks a histori...
08/10/2026

The 4th Infantry Division's 3rd Armored Brigade has officially transitioned into a Stryker brigade. This marks a historic shift as we trade in our mighty armored vehicles for the versatile Stryker platform.

This transformation aligns the 3rd Stryker Brigade with the U.S. Army's Pacific mission, making us more agile and ready to respond wherever we're needed. Steadfast and Loyal!

Soldiers from the 4th Infantry Division were on the cutting edge, testing the future of warfare at Fort Irwin, Californi...
08/07/2026

Soldiers from the 4th Infantry Division were on the cutting edge, testing the future of warfare at Fort Irwin, California!

In the harsh desert terrain, our soldiers assigned to the 1st Battalion, 8th Infantry Regiment, 3rd Armored Brigade Combat Team, pushed the boundaries of technology and teamwork. This premier, Army-hosted experiment allowed our forces to work alongside the joint force and multinational allies to integrate advanced equipment and technologies.

These experiments were a critical part of our continuous transformation efforts, helping shape how our warfighters will operate and win in the fast-paced, high-tech environments of tomorrow.

U.S. Army Pacific I Corps

(U.S. Army photos by Sgt. William Rogers, Spc. Jonathan Reyes, and Sgt. Kayla Cheesman-Miles)

Soldiers from Baker Company, 2nd Battalion, 12th Infantry Regiment, 2nd Stryker Brigade, 4th Infantry Division, integrat...
08/04/2026

Soldiers from Baker Company, 2nd Battalion, 12th Infantry Regiment, 2nd Stryker Brigade, 4th Infantry Division, integrated advanced battlefield capabilities during a recent exercise at Fort Irwin, California. From assembling and firing the FGM-148 Javelin to launching small Unmanned Aerial Systems (sUAS) for aerial reconnaissance, these troops successfully validated powerful weapons and modern tech in realistic tactical scenarios.

(U.S. Army photo by Spc. Jonathan Reyes)

U.S. Army Pacific I Corps

It is Fly Day Friday! We are looking to the skies at Fort Irwin, California, where 4th Infantry Division Soldiers are co...
07/31/2026

It is Fly Day Friday! We are looking to the skies at Fort Irwin, California, where 4th Infantry Division Soldiers are conducting hands-on experimentation with both manned and unmanned aviation systems.
During Project Convergence Capstone 6, our teams are testing premier combat aviation platforms including Apache helicopters alongside advanced Unmanned Aircraft Systems (UAS). By evaluating these capabilities in realistic environments, we continue to refine speed, lethality, and digital coordination to build future warfighting capabilities for the joint force.
U.S. Army Pacific I Corps

Ground systems modernization in action. At Fort Irwin, California, 4th Infantry Division Soldiers are conducting hands-o...
07/30/2026

Ground systems modernization in action. At Fort Irwin, California, 4th Infantry Division Soldiers are conducting hands-on experimentation with armored combat systems alongside critical support platforms designed to enable freedom of maneuver on the battlefield.
During Project Convergence Capstone 6 , this collaborative testing allows our team to evaluate emerging technology and build future capabilities, including the integration of advanced lethal effects, for the joint force.
U.S. Army Pacific I Corps

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Fort Carson, CO
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