Petar Graso's 'Kada krenu vlakovi' stands as a defining anthem of Yugoslav rock, capturing the restless spirit of the 1970s. The track exemplifies the genre's fusion of folk melodies with electric rock instrumentation, a signature sound that propelled Graso to international acclaim. Released during a period of intense cultural ferment, the song resonated deeply with audiences across the former Yugoslavia, becoming a staple of live performances and a symbol of a generation's identity. Its enduring popularity stems from its evocative lyrics and the raw energy of its recording, cementing Graso's legacy as a pivotal figure in the region's musical history. The song remains a powerful testament to the era's artistic freedom and the enduring appeal of rock music in the Balkans.