Right Sector 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 the Sich Battalion. White Hammer was expelled in March 2014, and Patriot of Ukraine left the organization, along with many UNA–UNSO members, in the following months.

Euromaidan, or the Maidan Uprising, was a wave of demonstrations and civil unrest in Ukraine, which began on 21 November 2013 with large protests in Maidan Nezalezhnosti in Kyiv. The protests were sparked by President Viktor Yanukovych's sudden decision not to sign the European Union–Ukraine Association Agreement, instead choosing closer ties to Russia and the Eurasian Economic Union. Ukraine's parliament had overwhelmingly approved of finalizing the Agreement with the EU, but Russia had put pressure on Ukraine to reject it. The scope of the protests widened, with calls for the resignation of Yanukovych and the Azarov government. Protesters opposed what they saw as widespread government corruption, abuse of power, human rights violations, and the influence of oligarchs. Transparency International named Yanukovych as the top example of corruption in the world. The violent dispersal of protesters on 30 November caused further anger. Euromaidan led to the 2014 Revolution of Dignity.