Diomedio Villanueva was retired Philippine Army General who served as Chief of Staff of the Armed Forces of the Philippines in 2001 - 2002. He succeeded General Angelo Reyes who was appointed as Secretary of National Defense upon his mandatory retirement.

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Diomedio Villanueva
Postmaster General
In office 2003–2010
President	Gloria Macapagal-Arroyo
Vice President	Noli De Castro Teofisto Guingona
Chief of Staff of the Armed Forces of the Philippines
In office March 17, 2001 – May 18, 2002
President	Gloria Macapagal-Arroyo
Vice President	Teofisto Guingona Jr.
Preceded by	Angelo Reyes
Succeeded by	Roy Cimatu
Commanding General of the Philippine Army
In office 2000–2001
President	Joseph Ejercito Estrada
Vice President	Gloria Macapagal-Arroyo
Preceded by	Angelo Reyes
Succeeded by	Jaime de los Santos
Commander of AFP South Luzon Command
In office May 1, 2000 – October 22, 2000
President	Joseph Ejercito Estrada
Succeeded by	Ernesto Carolina
Commander of AFP Southern Command
In office 1999 – March 16, 2000
President	Joseph Ejercito Estrada
Preceded by	Edgardo Espinosa
Succeeded by	Gregorio Camiling
Personal details
Died	May 1, 2023(2023-05-01) (aged 76) Libingan ng mga Bayani
Resting place	Libingan ng mga Bayani, Fort Bonifacio, Taguig
Education	Bachelor of Science Degree
Alma mater	Philippine Military Academy (1968)
Occupation	Soldier
Profession	Soldier
Military service
Allegiance	Philippines
Branch/service	Philippine Army
Years of service	1968 - 2002
Rank	General
Unit	1st Infantry Division
Commands	Armed Forces of the Philippines Philippine Army South Luzon Command Southern Command 1st Infantry Division
Battles/wars	Anti-Communist Campaign All Out war with MILF (2000) Anti-Terrorism Campaign (1999)

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• Chief of Staff of the Armed Forces of the Philippines
• Commanding General of the Philippine Army
• AFP Southern Luzon Command
• Commanders of the AFP Western Mindanao Command
• AFP Southern Command

1. Diomedio Villanueva
2. Villanueva named new Army chief
3. Arroyo Names Army Chief Villanueva As Head of the Philippine Military
4. AFP revolving door swings into action
5. Sandiganbayan acquits ex-AFP chief Diomedio Villanueva in graft case

1. Sandiganbayan acquits ex-AFP chief of graft Archived 2023-11-25 at the Wayback Machine
2. PH military adopting new titles: Chief of staff now Joint Chiefs Chair
3. Former Philippine military chiefs of staff Diomedio Villanueva,...