In 1901, Vojdanov began forming committees of the organization. During the Ilinden Uprising, Vojdanov and his group were active in the area of Gorna Debarca. After the uprising was suppressed, Vojdanov headed to Bulgaria. In March 1905 he entered Macedonia with his group and Alexander Protogerov. During the Balkan Wars, he served with the Macedonian-Adrianople group of volunteers in Bulgarian army. After the war, Petar Chaulev and Vojdanov, together with 189 rebels, returned to their revolutionary activities in Ohrid (now against the new Serbian government).