66th Separate Mechanized Brigade

The 66th Separate Mechanized Brigade named after Prince Mstyslav the Brave (66 OMBr) —

a brigade-sized mechanized formation of the Ground Forces of the Armed Forces of Ukraine.

Created after the start of the Russian-Ukrainian war in 2014

as a cadre military unit of the Reserve Corps.

Mobilized after Russia's invasion in 2022.

Fighting in Donetsk Oblast.

The brigade bears the name of Mstyslav the Brave — a Rus prince of the Rurikid dynasty.

In 2015—2017, the 66th Separate Mechanized Brigade was created

as a cadre military unit of the Reserve Corps.

After the start of Russia's full-scale aggression against Ukraine

in February 2022, the brigade was mobilized

and transferred to the combat structure of the Ground Forces.

In July 2022, the brigade took part in repelling

the Russian invasion in Donetsk Oblast.

On December 12, 2022, the brigade received its battle flag.

On December 8, 2023, it was awarded the honorary distinction "For Courage and Valor."

As of January 2025, the brigade's 402nd Rifle Battalion

was fighting in the Lyman direction.

three mechanized battalions;
69th Separate Rifle Battalion;
tank battalion;
artillery regiment, including:
two self-propelled artillery batteries;
anti-tank artillery battalion;
rocket artillery battalion;
anti-aircraft missile and artillery battalion;
sniper company;
reconnaissance company;
"Ptakhy" (Birds) strike drone company;
engineer-sapper battalion;
repair and recovery battalion;
logistics battalion;
signal company;
radar company;
medical company;
NBC (radiation, chemical, and biological) protection company;
military police platoon;
brigade band.

Operates mortars, anti-tank, and anti-aircraft weapons.
Main weapon — Ukrainian "Stugna-P" anti-tank guided missile systems.
Also equipped with Javelin systems and captured "Kornet" anti-tank guided missile systems.

On December 12, 2022, the Commander of the Ground Forces of the Armed Forces of Ukraine,

Colonel General Oleksandr Syrskyi, presented the brigade with its Battle Flag.

By Decree of the President of Ukraine No. 457/2023 of July 28, 2023,

the brigade was given the honorary name "named after Prince Mstyslav the Brave,"

in honor of the Prince of Tmutorokan and Chernihiv.

Full name: "66th Separate Mechanized Brigade named after Prince Mstyslav the Brave

of the Ground Forces of the Armed Forces of Ukraine."

Unit Day is celebrated on April 18.

Our motto is "Don't stand in the way."

We have no right to leave this war to our children.

We are obligated to root out this complete evil called "Russian fascism."

This is our main driving force — we are fighting for a happy and safe future for our children!