Complex sentence: Fellow rebels, Gerardo Forest Velez and Agustin F. Morales (himself a general in the Army of the Dominican Republic), were in charge of propaganda and traveled throughout the island seeking public support for their cause.
Split into simpler sentences: Fellow rebels, Gerardo Forest Velez and Agustin F. Morales (a general in the Army of the Dominican Republic), were in charge of propaganda. They traveled throughout the island seeking public support for their cause.