After the defeat of the Wallachian Revolution, he returned to Transylvania in September 1848, where he participated in the border guards' assemby at Orlat, and then in the third Blaj National Assembly. Named prefect of the Blaj district, he became commander of Legion I Blasensis, which he turned into the strongest military unit in the army of Avram Iancu. From October 1848 to August 1849, with the objective of disarming Hungarian units, he saw action at Uioara, Ciumbrud, Sâncrai, Cricău, Aiud, Turda, Cluj, Cetatea de Baltă, Ocna Sibiului, the Apuseni Mountains, Alba Iulia and elsewhere. The campaign ended with the Surrender at Világos.
