In 1902, when Pano Angelov stopped to teach, he went to Burgas where he met Mihail Gerdzhikov, Lazar Madzharov, Georgi Kondolov, Levter Mechev, Nikola Ravashola, Kiro Uzunov and other members of the Internal Macedonian-Adrianople Revolutionary Organization (IMARO).

He toured the villages of Strandzha, formed groups for executions, made conspiracies, collected finances and supplied the organization with weapons.

He showed remarkable organizational qualities, courage, coolness, honour and manners, because of which his revolutionary band earned the confidence of the population.

All villages of his region of supervision founded groups for executions, organized a network of couriers, supplied weapons and ammunition and provided new freedom fighters to join the bands.

In 1997, on the occasion of the centenary of the foundation of the organization in Thrace and 94-year anniversary of the heroism in Sarmashik, a remembrance plaque was erected in Dimanova polyana (Brashlyansko zemlishte), where Pano Angelov was killed.