Right Sector (Ukrainian: Пра́вий се́ктор, romanized: Pravyi sektor) is a loosely defined coalition of right-wing to far-right Ukrainian nationalist organizations. It originated in November 2013 as a right-wing, paramilitary confederation of several ultranationalist organizations at the Euromaidan revolt in Kyiv, where its street fighters participated in clashes with riot police. The coalition became a political party on 22 March 2014, at which time it claimed to have roughly 10,000 members. Founding groups included the Trident (Tryzub), led by Dmytro Yarosh and Andriy Tarasenko, and the Ukrainian National Assembly–Ukrainian National Self-Defense (UNA–UNSO), a political and paramilitary organization. Other founding groups included the Social-National Assembly, and its Patriot of Ukraine paramilitary wing, White Hammer, and Sich. White Hammer was expelled in March 2014, and Patriot of Ukraine left the organization, along with many UNA–UNSO members, in the following months.
Right Sector has been described as a right-wing or far-right nationalist political party and movement. Right Sector was the second-most mentioned political group in Russian media during the first half of 2014, and Russian state TV depicted it as neo-Nazi. In March 2014, Associated Press declared that it has found no evidence that the group had committed hate crimes.