# 40th Coastal Defense Brigade (Ukraine)

The 40th Coastal Defense Brigade (Ukrainian: 40-та бригада берегової оборони), is a formation of the Ukrainian Marine Corps formed in 2023. It was created as the 150th Mechanized Brigade (Ukrainian: 150 окрема механізована бригада, romanized: 150 okrema mekhanizovana bryhada) as a part of the creation of four other brigades to expand the Ukrainian Ground Forces in response to the 2022 Russian Invasion of Ukraine and was expected to participate in a potential Ukrainian counteroffensive in 2024. In December 2024, it was transferred to Ukrainian Marine Corps and dispatched to Kherson.
As of 1 August 2024, it was known that elements of the brigade have been deployed to the Toretsk direction in eastern Ukraine to help stabilise the situation near Niu York and Toretsk itself.

## History
### Formation

The brigade was announced in mid-October 2023, alongside the creation of five new mechanized brigades as part of the Ukrainian Ground Forces, accounting for a five percent expansion of the Ground Forces.
By 17 October 2023, it was reported that the brigade had already received a military unit identification number, and was in the stage of formation. It was reported by the brigade that the unit is trained in accordance with NATO standards and personal war experience.
It was reported by Forbes that the brigades are drawing their cadres of experienced officers and non-commissioned officers from existing brigades, while filling out the rest of their positions with new mobilized recruits. The brigade is also reportedly structured with the command and organisational core consisting of experienced servicemen with combat experience gained in eastern Ukraine in skirmishes with the Russian Armed Forces. The brigade includes both military personnel who have recently started their career, alongside experienced soldiers.
According to Forbes, it is unclear where the brigade will receive its equipment that makes them a mechanized brigade; rather than a glorified infantry or motorized brigade. It was noted that the new brigades may not receive new, modern vehicles such as Polish KTO Rosomak "Wolverine's" but will instead have to make do with old, vulnerable, and plentiful BMPs and other old-era Soviet equipment. Since then, the brigade has upgraded several of its armoured vehicles to meet modern requirements.

### Insignia

The sleeve insignia of the brigade has an appearance reflecting where the units garrison is located at, in Volyn, Volyn Oblast. The insignias appearance consists of a shield cut in half diagionally, with the lower portion being a green canvas with three spears pointing from the bottom right to the top left of the shield. The upper half of the shield is a red canvas with a white heraldic cross, symbolising the flag of Volyn Oblast. A subdued variant of the insignia also exists in darker, more greyer green colours to hide the primary colour elements of the insignia to make it less distinguishable and visible.
The insignia has a strikingly similar resemblance to the insignia of the 14th Mechanized Brigade, another mechanized brigade of the Ukrainian Ground Forces which also contains a spear and a flag of Volyn Oblast on its insignia.

## Equipment
### Small arms

The brigade is armed with a variety of small weapons, official publications by the brigade show that soldiers of the brigade primarily utilise older models of the Kalashnikov rifle series such as the AKM. Very few publicised materials of the brigade show more modernised variants of these rifles such as the AK-74, being used in limited numbers. Additionally, the brigade also possesses some units of M240Bs.
As of July 2024, the brigade utilizes the following small arms:
* AKM – Soviet/Russian assault rifle
* AK-74 – Soviet/Russian assault rifle
* AK-74M – Russian assault rifle
* M240B – American general-purpose machine gun

### Vehicles

The brigade holds a number of vehicles in its arsenal. Similarly to other brigades such as the 154th Mechanized Brigade, the brigade has received older Soviet-era model tanks such as the T-64BV. Several T-64BV tanks are in the brigades possession, notably with the modifications from 2017.
The brigade also has a small quantity of infantry fighting vehicles such as the BMP-2, with one being present amongst the brigade's inventory and in service. Some of these vehicles are also of Czechoslovakian origin, being designated as BVP-2. Limited numbers of BMP-1's have also been sighted on publications by the brigade, being a BMP-1TS variant used by the brigade. The brigade is also known to have several BRDM-2's in service, as well as a BREM-2.
In June 2024, it was reported that several old Soviet-era tanks such as the T-64 in the brigade's service were upgraded to meet modern standards.
As of June 2024, the brigade operates the following vehicles:
* T-64 – Soviet main battle tank
* BMP-1 – Soviet amphibious tracked infantry fighting vehicle
* BMP-2 – Soviet amphibious tracked infantry fighting vehicle
* BRDM-2 – Soviet amphibious armored scout car

## Russo-Ukrainian War
### Russian invasion of Ukraine

The brigade was reported to be formed in anticipation of a potential Ukrainian counteroffensive in 2024, as well as to bolster Ukrainian defenses in eastern Ukraine to relieve depleted units deployed there.

#### Battle of Toretsk

Similarly to other brigades such as the 153rd Mechanized Brigade which has been deployed to Kharkiv Oblast amidst Russia's 2024 Kharkiv offensive, seeing combat action, the brigade also has recently been deployed in response to the growing situation in eastern Ukraine. According to social media publications, it was acknowledged that some elements of the brigade have been deployed to the Toretsk direction in Ukraine, an industrial city located in the Bakhmut raion which is located approximately 15 kilometers from the town of Niu York in eastern Ukraine. This confirms the purpose of the brigade to be utilised in bolstering Ukrainian defenses in the east of the country.

### Transfer to Marine Corps

At the end of December 2024, it transferred to the 30th Marine Corps and was transformed into the 40th Separate Coastal Defense Brigade. In December 2024, the brigade stopped multiple Russian assaults in Kherson Oblast destroying multiple vessels, pieces of equipment, positions and also killing Russian soldiers using drones. In January 2025, many Russian vessels were destroyed by the brigade on the Dnieper. The brigade was reported to have been successful in repulsing a Russian amphibious offensive across the Dnieper. Russian forces had deployed 300 vessels in preparation of the amphibious assault but were being continuously repulsed by the FPV units of the brigade who were also able to destroy multiple Russian positions across the river. In January 2025, the brigade received BvS10 armored amphibious assault vehicles. On 22 January 2025, the brigade released a video showing its BMP-1 IFVs armed with "spear" combat modules conducting demining operations and also conducting strikes on Russian positions on the left bank of Kherson destroying Russian positions and equipment. The brigade also utilizes BMP-2 IFVs in its operations. Ukrspecsystems Sharks and ZU-23-2s are also being used by the brigade for operations against Russian forces.

## Structure
### 2024

As of 23 January 2024, the brigade's structure is as follows:
* 150th Separate Mechanized Brigade
** Brigade's Headquarters
** 1st Mechanized Battalion
** 2nd Mechanized Battalion
** 3rd Mechanized Battalion
** Tank Battalion
** Reconnaissance Company
** Artillery Group
** Anti-Aircraft Defense Battalion
** Engineer Battalion
** Logistic Battalion
** Signal Company
** Maintenance Battalion
** Radar Company
** Medical Company
** Chemical, biological, radiological, and nuclear Protection Company

### Current Structure

The current Structure of the brigade is as follows:
* Management & Headquarters
* Commandant platoon
* 1st Coastal Defense Battalion
* 2nd Coastal Defense Battalion
* 3rd Coastal Defense Battalion
* Orion UAV Battalion
* Tank Battalion
* Reconnaissance Company
* Artillery Group
* Anti-Aircraft Defense Battalion
* Engineer Battalion
* Logistic Battalion
* Signal Company
* Maintenance Battalion
* Radar Company
* Medical Company
* Chemical, biological, radiological, and nuclear Protection Company