In the 1945 liberation of Pampanga, Kapampangan guerrilla fighters and the Hukbalahap Communist guerrillas supported combat forces from Filipino and American ground troops in attacking Japanese Imperial forces during the Battle of Pampanga until the end of the Second World War.Local military operations soldiers and officers of the Philippine Commonwealth Army 2nd, 26th, 3rd, 32nd, 33rd, 35th, 36th and 37th Infantry Division and the Philippine Constabulary 3rd Infantry Regiment recaptured and liberated the province of Pampanga and fought against the Japanese Imperial forces during the Battle of Pampanga.On December 8, 1941, Japanese planes bombed Clark Air Base marking the beginning of the invasion of Pampanga.
The June 1991 eruption of Mount Pinatubo displaced a large number of people with the submersion of whole towns and villages by massive lahar floods.
Pampanga covers a total area of 2,002.20 square kilometres (773.05 sq mi) The province is bordered by Tarlac to the north, Nueva Ecija to the northeast, Bulacan to the east, the Manila Bay to the central-south, Bataan to the southwest, and Zambales to the northwest.
Its terrain is relatively flat with one distinct mountain, Mount Arayat and the notable Pampanga River.
By 2015, the province has 2,198,110 inhabitants, Ancient Pampanga's territorial area included portions of the modern provinces of Tarlac, Bataan, Zambales, Nueva Ecija and Bulacan.
Pampanga was re-organized as a province by the Spaniards on December 11, 1571.
The old Pampanga towns of Aliaga, Cabiao, Gapan, San Antonio and San Isidro were ceded to the province of Nueva Ecija in 1848 during the term of Spanish Governor-General Narciso Claveria y Zaldua.