The Siles presidency was short and marred by disagreements with the powerful Commander of the Armed Forces, General Alfredo Ovando. The latter harbored ambitions to become president in 1970, when he was projected to run as Barrientos' successor.
The Siles presidency was brief and contentious due to conflicts with General Alfredo Ovando, who harbored ambitions to be president in 1970 when he was expected to succeed Barrientos.