Afterwards he became an active member of the Macedonian liberation movement and took part in the Miss Stone Affair in 1901 in Pirin Mountain.

After the suppression of the Ilinden-Preobrazhenie Uprising in 1903 together with Yane Sandanski and Dimo Hadjidimov, he set the base of the left wing of IMRO.

During this period he led a band in Kilkis' region and worked as a military instructor in IMRO.

After the Young Turks revolution in 1908, Chernopeev was one of the founders of the People's Federative Party (Bulgarian Section).

[2] Later, the authorities in North Macedonia obliterated the graves and a playground was built in their place.