[11][12] In November 2022, the Ukrainian Volunteer Corps was reformed as the 67th Separate Mechanized Brigade "DUK", and were training in the United Kingdom.

[14][15] The Ukrainian Volunteer Corps has its origins in vigilante militias created by the Right Sector formed during the Euromaidan and the Revolution of Dignity.

After the fall of the Yanukovych government, the police largely abandoned the streets of Kyiv and groups of young men, including members of Right Sector, patrolled them armed mostly with baseball bats and sometimes with guns.

[17] On 20 April, Yarosh led a group of armed Right Sector members who were covertly sent by acting Ukrainian President Oleksandr Turchynov to destroy the transformer of the Sloviansk television station on Karachun mountain.

The regular Ukrainian Armed Forces suffered a number of defeats and setbacks against the separatists, as they were ill-prepared, ill-equipped, lacking in professionalism, morale, and fighting spirit, and with severe incompetence in the high command.

[20] The reaction to these failures saw the creation of various "volunteer battalions" militias and paramilitary groups formed by willing civilians to fight the separatists on their own initiative.

[6] The Ukrainian Volunteer Corps went to the front in the Donetsk Oblast, where they had their baptism of fire at the Battle in Shakhtarsk Raion when they captured the town of Avdiivka from the Russian separatist forces in Donbas together with the 93rd Mechanized Brigade.

[25] Five days later, Right Sector accused the Ministry of Internal Affairs of harbouring counterrevolutionary forces seeking to destroy the Ukrainian volunteer movement.

[27] The Right Sector also demanded that President of Ukraine Petro Poroshenko "clean out" the Ministry of disloyal members, otherwise they would withdraw from the combat zone and march to Kyiv.

[30] Due their fierce defense, the troops that fought in Donetsk Airport were nicknamed "Cyborgs" (Ukrainian: кіборг, romanized: kiborh), a moniker given by DPR separatists.

[32]In February 2015, the Azov Battalion started a military operation to push DPR separatist forces away from Mariupol, and it turned into a fierce battle for control of the village of Shyrokyne.

According to Yarosh, by 2016 circa 300 volunteers remained in the contact line doing specific tasks, such as reconnaissance and counter-sniper operations.

According to President of Ukraine Petro Poroshenko's parliamentary faction leader Yuriy Lutsenko, these events "result[ed from] the conflict of interests between illegal armed groups and a mafia overtly cooperating with law enforcers.

[43][44] The Right Sector paramilitaries of the Ukrainian Volunteer Corps joined the blockage, together with members of the Azov Regiment they provided security to the demonstrators.

[48] On 14 March, co-founder of the Right Sector and 2nd Separate Battalion commander Mykola Kravchenko was killed in action in the village of Horenka during the Kyiv offensive along with a Fox News journalist.

[11] In July, the 4th Tactical Group was fighting in the region of Soledar and on 2 August, its commander Andriy Zhovanyk died in combat.

[3] In November 2022, the Ukrainian Volunteer Corps was reformed as the 67th Separate Mechanized Brigade "DUK", and were training in the United Kingdom.

The military prosecutor spoke out against weapons in the rear "under the slogans of patriotism" and noted that if "we start turning a blind eye to this, then chaos will come in Ukraine" At the same time, he added that many of the dead fighters of the Right Sector are heroes who defended the country.

[59] In 2014, the structure of the Ukrainian Volunteer Corps was composed by mobilization, training and intelligence centers, and battalions, which are divided into combat (directly participating in hostilities) and reserve.