A Second Marine Corps? The Transformation of Ukraine's Marines
October 3, 2026
The Short Version
Ukraine's Marines have grown from a handful of brigades into the largest single corps in the Armed Forces of Ukraine. At the same time, Kyiv is standardizing its ground forces around corps of roughly five brigades each. Those two trends are on a collision course. Add a recent command shake-up that separated the Marine branch commander from the 30th Marine Corps, and the signs point in one direction: Ukraine is likely preparing to stand up a second Marine corps.
The Corps Reform
Over the past year and a half, Ukraine has rebuilt its army around the corps. Instead of brigades operating loosely under regional commands, brigades are being grouped under standing corps headquarters that function much like a U.S. Army division. As of early 2026, 18 corps had been established. Commander-in-Chief Oleksandr Syrskyi has described a second stage of the reform in which each corps commands about five brigades, gains its own artillery brigade, and expands its unmanned systems battalion to a full regiment.
The structure is converging on a standard model. Brigades are increasingly being organized around four maneuver battalions, and most corps now carry five or six brigades. The 7th Air Assault Corps and the 20th Corps, for example, each field about five known brigades. Some oversized corps are being trimmed, and brigades are being shifted between corps to match their sectors. The goal is a predictable, interchangeable building block: a corps that a commander can plan around, supply, and rotate as a unit.
The Outlier: 30th Marine Corps
The 30th Marine Corps does not fit that model. Its order of battle now includes the 32nd, 34th, 35th, 36th, 37th, 38th, 39th, 40th and 42nd Marine Brigades. That is nine brigades, close to twice the size of a standard corps. Several of them, including the 34th, 39th and 40th, began as coastal defense brigades and have been converted to Marine brigades, showing that the Marine force is still growing.
The picture gets bigger when you look at the Kherson sector, the corps' main area of operations. Fighting alongside the Marine brigades are attached units including the 102nd Territorial Defense Brigade, the 34th National Guard Regiment, the 21st Public Order Protection Brigade, and likely one or two more territorial defense units. If those units are formally folded into the corps, as the reform intends for brigades fighting in a corps sector, the 30th would command well over a dozen brigade-sized formations across a long river front.
No corps headquarters can manage that span of control efficiently. By the army's own standard, the 30th is carrying the load of two corps.
The Command Change That Gives It Away
On September 22, 2026, Ukraine's Defense Minister appointed Colonel Serhii Shatalov to command the 30th Marine Corps. Shatalov previously led the 37th Marine Brigade, which liberated several villages under his command. His predecessor, Major General Dmytro Deliatytskyi, did not leave. He moved up to command the Marine Corps of the Ukrainian Navy, the branch as a whole.
On its face, that looks redundant. If there is only one Marine corps, then the commander of the Marines and the commander of the 30th Corps are effectively the same job. Splitting them into two posts only makes sense if the Marine branch is about to oversee more than one corps. A branch commander sitting above a corps commander creates exactly the headquarters structure needed to add a second corps beneath him.
What a Second Corps Would Look Like
The most logical split would divide the existing nine Marine brigades roughly in half, giving each corps four or five Marine brigades, in line with the rest of the army. Each new corps would then absorb the territorial defense, National Guard and other units fighting in its sector, along with its own artillery brigade and unmanned systems regiment. One corps could focus on the Kherson and Dnipro river front, and the other on the coastal and southern sectors where Marine brigades have been operating.
This would also fit the Marines' history. Ukraine's Marine force grew from a few battalions in 2014 to a brigade, then to a full corps. A second corps is the next step in that growth, not a break from it.
Why It Matters
A split would give Ukraine's Marines two manageable headquarters instead of one overstretched one, improve control over a long and active front, and bring the Marines in line with the corps standard the rest of the army is adopting. It would also mark the Marines' arrival as a true service branch, with a branch commander overseeing multiple corps, much as the U.S. Marine Corps oversees multiple Marine divisions.
Nothing has been announced yet. But the numbers, the reform's own standard, and the command change all point the same way. Watch for a new corps number and a redistribution of Marine brigades in the coming months.
Sources
•Kyiv Independent: "Second stage" of Ukrainian military's corps reform underway, Syrskyi says
•Militaryland: New commander appointed to 30th Marine Corps
•MOST: Former 30th Marine Corps commander Dmytro Deliatytskyi appointed head of Ukrainian Naval Infantry
•Interfax-Ukraine: Commander of 30th Marine Corps Deliatytsky to become commander of Ukrainian Navy's Marine Corps