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Russia’s War in Ukraine Means More U.S. Forces Are Headed to Europe

U.S. Army
U.S. Army Soldiers with 1st Squadron, 2nd Cavalry Regiment, provide support by fire during a multinational training event for exercise Puma 2 with Battle Group Poland at Bemowo Piskie Training Area, Poland on June 14, 2018 as part of Saber Strike 18. This year's exercise, which runs from June 3-15, tests allies and partners from 19 countries on their ability work together to deter aggression in the region and improve each unit's ability to perform their designated mission. (U.S. Army photo by Spc. Hubert D. Delany III /22nd Mobile Public Affairs Detachment)

On June 29, the Biden administration announced that in response to Russia’s full-scale invasion of Ukraine, it was broadly expanding U.S. military forces based permanently or on a rotating basis in Europe.

This comes as eastern European NATO member states request a more robust force capable of outright defeating a Russian invasion, not merely serving as sacrificial ‘trip-wires’.

Prior to that statement, Putin’s aggression had already spurred Washington to increase U.S. military personnel in Europe from 80,000 to 100,000 (mostly non-combat) troops, some of whom will now be staying in the region in one fashion or another (A detailed yet simplified outline of the U.S. force structure in Europe can be found below). The new force structure may also contribute to ambitious plans by NATO to increase its so-called high readiness forces from 40,000 to 300,000 troops.

For now, U.S. deployments apparently remain constrained by the 1997 NATO Founding Act, in which the alliance pledged not to permanently station “substantial” combat troops in its newest eastern European members. Thus, the new permanently-based troops are mostly headquarters and support units; while combat troops are continuously rotated into the region as part of NATO’s Enhanced Forward Presence (eFP) program, which has been in place since 2015.

The remainder of this article looks at six ways the U.S. military’s presence in Europe is being upgraded.

V Corps Will Be Permanently Based in Poland—Along With “Other Capabilities”

A ‘corps’ is a high-level military formation composed of multiple divisions (10,000-15,000 soldiers) and/or separate brigades (3,000 to 4,000 soldiers). A corps also manages many smaller units that provide specialized support capabilities (air defense, long-range artillery, engineering support, logistics, etc.) to help maneuver combat units accomplish their mission.

The U.S. Army’s V Corps was long associated with operations in Europe starting with its founding in World War I, its landing at Omaha Beach in World War II, and it’s overseeing of a powerful Cold War garrison in Germany. It was finally deactivated in 2013 following deployments to Iraq and Afghanistan.

The corps was resurrected in 2020 at Fort Knox, Kentucky with a focus on Eastern Europe, with 200 personnel out of its 635-soldier HQ unit stationed at Poznan, Poland. Now the HQ will be permanently based there, alongside a Field Support Battalion that helps manage installations and inventory and provide maintenance services.

A former planner for the U.S. Army battle group in Poland wrote to me that the corps HQ will result in more cohesive defensive planning for Poland and the Baltics, and could enhance interoperability with the diverse hodgepodge of international troops in NATO’s forward presence battlegroups. These potential enhancements are covered in more detail in a companion article.

The White House promised other unspecified “enhancements” to the U.S. armored brigade routinely rotated into Poland and smaller units in the Baltics.

An Additional Rotational Brigade in Romania

Washington furthermore plans to continuously rotate a brigade in Romania to supplement the one in Poland. Currently, 4,700 soldiers from the 101st Airborne Division’s second Brigade Combat Team (BCT) are tapped for that role.

Like Poland, Romania hosts a key U.S. missile defense base. Furthermore, nearby Moldova – a country formed out of Romanian territory seized by the Soviet Union during  World War II – encompasses Transdniestria, a separatist-controlled region on which Russian battalions are deployed. Russia’s military has suggested it would seek to occupy a “land corridor” across Ukrainian territory connecting Russia to Transdniestria.

The former Army planner cautioned, however, “… the facilities do not exist in Romania to base and employ an airborne force to their full potential, so they would effectively become a light infantry force. The 173rd [Airborne Brigade] out of Italy would be more than able to cover any contingencies requiring airborne forces. I would expect the rotational BCT [in Romania] to be filled by active-duty or National Guard BCTs from the US, probably an Infantry BCT first, then transitioning to an Armor BCT.”

Two more F-35 Squadrons in the United Kingdom

The British Royal Air Force base at Lakenheath, 50 miles northeast of London, already hosts two squadrons of U.S. Air Force F-35A Lightning stealth jets: the 493rd ‘Grim Reapers’ and 495th ‘Valkyries’ Fighter Squadrons, each with 24 jets each.

The Pentagon now plans to take advantage of the special infrastructure already in place at Lakenheath by doubling the number of Lightning squadrons there to four, for a total of 96 F-35A.

Stealth aircraft are difficult to detect on radar and even harder to attack at a distance, meaning they can intervene on Day One of a war even where Russian air defenses such as fighters and long-distance surface-to-air missile batteries have yet to be knocked out. Though not invulnerable, that gives stealth fighters far greater freedom to operate over contested or enemy airspace.

Lakenheath is less exposed to Russian tactical ballistic missiles than airbases in Germany—but still within range of Russia’s air-launched hypersonic missiles and sea- and air-launched subsonic cruise missiles. There are concerns that airbases in the UK lack ground-based air defense.

Two more U.S. Navy Destroyers Based in Spain

Since 2014, the U.S. Navy has forward-deployed four Arleigh Burke-class missile destroyers in Rota, Spain. These destroyers routinely surveil and confront Russian naval operations in the Mediterranean, Baltic, and (until recently) Black seas.

US Navy

PHILIPPINE SEA (June 23, 2020) The Arleigh Burke-class guided-missile destroyer USS Ralph Johnson (DDG 114) and the Ticonderoga-class guided-missile cruiser USS Princeton (CG 59) steam in formation during dual carrier operations with the Nimitz and Theodore Roosevelt Carrier Strike Groups (CSG). Dual carrier operations unify the tactical power of two individual CSG, providing fleet commanders with an unmatched, unified credible combat force capable of operating indefinitely. The CSGs are on a scheduled deployments to the Indo-Pacific.

This force will expand in number to six by 2024, making more available for patrols and exercises with European navies. A potential maintenance scheme with Spanish shipbuilder Navantia could reduce operating costs.

Currently, the Navy’s Rota detachment comes from Destroyer Squadron (DESRON) 60: USS Donald Cook, Ross, Carney, and Porter. All are upgraded for ballistic missile defense capability, meaning they can protect broad areas including adjacent cities from missile attacks using SM-3 Block II missiles.

The versatile warships also are armed with MH-60R anti-submarine helicopters and torpedoes, Harpoon anti-ship missiles, a mix of Tomahawk land-attack cruise missiles, and various short- and long-range air defense missiles in their 90 missile-launching cells.

The Rota-based destroyers have also been uniquely modified with additional defenses against Russian anti-ship missiles, including a rear-facing short-range SeaRAM air defense and an SLQ-62 device apparently designed to jam Russia’s ramjet-powered P-800 Oniks anti-ship cruise missiles.

Air Defenses in Germany and Italy

Russia’s campaign of long-distance missile strikes seemingly has spurred the deployment of additional U.S. air defenses to Europe. That includes a short-range air defense (SHORAD) battery of 65 personnel for Italy, a SHORAD battalion in Germany, and an Air Defense Brigade HQ.

SHORAD units provide local, low-altitude air defense, and will likely be employed to protect U.S. Air Force and Army bases from Russian cruise missiles which could destroy key assets like combat aircraft and fuel or weapons depots.

These units typically operate Avenger Humvee armed with Stinger missiles, though some may receive six-wheeled Stryker M-SHORAD armored vehicles festooned with Stinger and Hellfire missiles and a 30-millimeter cannon.

The brigade HQ, meanwhile, could facilitate a more cohesive air defense scheme in Eastern Europe than the current patchwork.

According to the former Army planner, “… having a permanent air defense brigade presence there would certainly allow for the US to implement a proper large scale integrated air defense system (IADS). Currently we have some scattered Patriot batteries, some attached Avengers, and other pieces of operational/tactical AD systems, but no real “curtain” that would be able to interdict Russian air/missile systems across the frontier. Additionally, many of our allies rely on Soviet-era systems that will not interface with our modern systems. With a [air defense brigade HQ] to plan and implement, we would be able to integrate all of our current assets including the F-35. It is a major step forward in the fight for air superiority over Eastern Europe.”

Engineering and Logistics Support

The 625 personnel going to Germany also include an engineering brigade HQ and a combat sustainment support battalion HQ.

According to the Army planner, these could provide crucial support services:

“… the existing infrastructure in the East is much more accommodating to Soviet-era armor than modern western tanks (ie. a lot of the bridges simply won’t hold a Leopard 2 or Abrams tank).” [The Leopard 2 and Abrams weigh 60-70+ tons, while Soviet/Russian designs run 40-50 tons.] “This has led to some fairly creative planning/rehearsals regarding occupying forward defensive positions. The engineer brigade would provide the expertise to allow the US/NATO to request prioritization of civil works to support contingency planning, and also provide additional resources (Joint Assault Bridges, Ribbon Bridges) to support maneuver forces on the ground.”

M1A2 Abrams Tank

Aerial drone image of an M1A2 Abrams Main Battle Tank crew, from the 1st Armor Brigade Combat Team, 3rd Infantry Division, conducting Table VI Gunnery at Fort Stewart, Ga. December 6, 2016.

This CCSB battalion could help accelerate the rapid deployment of additional U.S. formations in an emergency by leveraging pre-positioned stocks of U.S. heavy military equipment in Europe which can be rapidly manned by U.S. personnel. According to the former planner, those stocks could generate a U.S. armored brigade in a week’s time.

Here’s what the U.S. Army already had in Europe prior to 2022.

Major combat units:

  •         2nd Cavalry Regiment (mounted in Stryker wheeled troop carriers) in Vilseck Germany.
  •         173rd Airborne Brigade in Vicenza, Italy (a jump-qualified light infantry brigade)
  •         Rotating armor brigade in Poland

Combat Support units, i.e. those that participate in combat but aren’t intended to attack or defend ground:

  •         41st Field Artillery Brigade  (M270 rocket artillery, 2x battalions) at Grafenwoehr, Germany
  •         12th Combat Aviation Brigade (1x attack helicopter battalion, 1x mixed utility battalion) at Ansbach, Germany
  •         10th Army Air & Missile Defense Command (1x SHORAD battalion, 1x Patriot battalion)
  •         2nd Multi-Domain Task Force in Germany (artillery, air defense, and electronic warfare)

Non-combat Support Units

  •         21st Sustainment Command, which includes three support brigades and one brigade each of Sustainment, Military Police, Medical,
  •         A brigade each dedicated to: Theater Signals, Military Intelligence, Transportation

U.S. Air Force Flying Units Permanently Based in Europe

This is a count of operational flying squadrons permanently based in Europe prior to June 2022. (ie. excluding ground-based support units and those detached for operations in Africa.)

Combat units

  •         31st Fighter Wing at Aviano Airbase, Italy  (2x F-16C/D squadrons, 1x HH-60G Search & Rescue squadron)
  •         48th Fighter Wing at RAF Lakenheath, UK (2x F-15E squadrons, 2x F-35A squadrons)
  •         52nd Fighter Wing at Spangdahlem Airbase, Germany (1x F-16 squadron)

Support Units

  •         100th Air Refueling Wing at RAF Mildenhall, UK (1x KC-135R squadron)
  •         86th Airlift Wing (Ramstein Air Base) (C-130Js and light transports)
  •         52nd Special Operations Wing at RAF Mildenhall (MC-130J special ops transports, CV-22B tilt-rotor transports)

Sébastien Roblin writes on the technical, historical and political aspects of international security and conflict for publications including The National Interest, NBC News,, War is Boring and 19FortyFive, where he is Defense-in-Depth editor.  He holds a Master’s degree from Georgetown University and served with the Peace Corps in China.  You can follow his articles on Twitter.

Written By

Sebastien Roblin writes on the technical, historical, and political aspects of international security and conflict for publications including the 19FortyFive, The National Interest, NBC News,, and War is Boring. He holds a Master’s degree from Georgetown University and served with the Peace Corps in China.