There are several ancient inscriptions which attest Kamboja rule in
Bengal. The most important sources are:
Dinajpore Pillar Inscription The
Dinajpur Pillar Inscription records to a Kamboja king called the
Kambojanvaya Gaudapati (i.e. lord of
Gauda).. The Pillar Inscription was originally established in a
Siva temple that was built by the king but removed to Bangar, about 40 miles east of Gauda, during the period of
Muslim rule. During the 18th century, the Pillar was further moved to Dinajpore by Maharaja Ram Nath and as a result, the inscription came to be known as Dinajpore Pillar Inscription. The Dinajpore Pillar Inscription dates to the second half of the 10th century.
Irda Copper Plate (Tamrapatra) The Irda Copper plate (
Irda Tamarapatra) is another source on the Kamboja-Pala dynasty and was discovered in 1931. It is written in
Sanskrit and has 49 lines of text in ancient Bengali
script. The Vamsa or the tribal identity of the rulers mentioned in the Irda Copper Plate is specifically stated to be
Kamboja-Vamsha-Tilaka (i.e. Ornament of the Kamboja family or Glory of the Kamboja tribe). Like the Dinajpore Pillar Inscriptions, the Irda
Copper plate is also thought to belong to the second half of tenth century (Dr N. G. Majumdar, Dr R. C. Majumdar). Hence the academic community believes that the Kambojanvaya Gaudapati of Dinajpore Pillar Inscriptions and the Kambojavamshatilaka Paramasaugata Maharajadhiraja parameshvara paramabhattaraka Rajyapala of Kamboja-Pala dynasty of Irda Copper Plate Inscriptions refers to the same Kamboja family. But whereas the Dinajpur Pillar inscriptions refer just to one Kamboja ruler with the appellation of "Kambojanvaya Gaudapati", the Irda Copper plate, mentions generation after generation of the Kamboja-Pala kings of Bengal i.e. Rajyapala, Narayanapala and Nayapala etc. The Kamboja-Pala kings of the Irda Copper plate had ruled north-west Bengal in the tenth or eleventh century.
Bangar Grant of Mahipala I Bangar Charter of
Mahipala I is the third very important ancient source of Kamboja rule in Bengal. The charter asserts that Mahipala had re-conquered nearly the whole of north and east Bengal
"after defeating the usurpers who had seized his ancestral kingdom". The same verse has been repeated in the Aamgaachhi Charter of Vigrahapala-3. But who were the usurpers the inscription does not tell, but other evidences indicate that the rulers belonging to the Kamboja family were in possession of the north and west Bengal. Scholars believe that Mahipala's Charter alludes to the seizing of the northern parts of Bengal by Kamboja dynasty from the Gopala II or Vigrahapala II of the Pala dynasty, which the great king Mahipala I claims to have won back by the force of his arms ==Extent of Kamboja Empire==