Kozak System, a Ukrainian rock band, was formed in 2012 in Kiev by musicians from Haydamaky. The band consists of Ivan Lenyo on vocals and accordion, Oleksandr Demianenko on guitar, Volodymyr Sherstyuk on bass, Serhiy Soloviy on trumpet, and Serhiy Borysenko on drums. Their debut concert took place in Ternopil on May 20, 2012, and their first album, Sablja, was released later that year. In 2014, Kozak System actively participated in the Euromaidán protests and released "Brother for Brother", an unofficial anthem of the revolution. The band has performed in over 18 countries, including notable appearances at the festival Przystanek Woodstock in Poland. Their subsequent albums include Pisni samonavedennja (2014) with Taras Chubai, Zyvy and Ljuby (2015), and Ne moja (2018). In 2017, their single "Not Mine" won Single of the Year at the Jam FM Selection Awards.
