Therefore, he joined the army of Simón Bolívar in the midyear of 1820 as a low ranking officer. Felipe Braun, as he was called from then on, participated in the campaigns of New Granada and the Battle of Carabobo in Venezuela. He joined the Guard of Simón Bolívar in 1821 and accompanied him on his Campaign of South to liberate today's Ecuador and Peru as one of his many officers.