Analysis of information sources in references of the Wikipedia article "Pala Empire" in English language version.
The Pala emperors held East India from the eighth to the twelfth century A. D. and were noted for their patronage of Mahāyāna Buddhism. At the same time they established other monasteries at Vikramaśīlā, Somapura, Odantapuri and Jagaddala, which might have created a division in the activities of Buddhist scholars.
Dharmapala's empire, which stretched from the Gulf of Bengal to Delhi and from Jalandhara to the Vindhya Mountains.
The Pala kings patronized Hinduism too. They gave donations for learning and for educational purposes.
Domanadasa, ancestor of the great Vaidya Kulina Vamanadasa, married in the Kayastha Pala family. Pala was also a Kayastha surname and we can claim Palas also as Kayasthas.
Dharmapāla after defeating Indrāyudha and capturing Kanuaj made it over to Cakrāyudha, who was a vassal king of Kanuaj subordinate to Dharmapāla ... Dharmapāla was thus acknowledged paramount ruler of almost whole of North India as the Bhojas of Berar, Kīra (Kangra district), Gandhāra (West Punjab), Pañcāla (Ramnagar area of U.P.), Kuru (eastern Punjab), Madra (Central Punjab), Avanti (Malwa), Yadus (Mathura or Dwarka or Siṁhapura in the Punjab), Matsya (a part of Rajputana) were his vassals.
Nāgabhaṭa-II defeated Cakrāyudha and occupied Kanauj ... battle between the king of Vaṅga and Nāgabhaṭa in which the latter emerged victorious ... may have been fought at Mudgagiri (Monghyr in Bihar). If so, it shows the utter humiliation of Dharmapāla and strengthens the suspicion that as a revenge he might have surrendered to and welcomed Govinda III when he invaded North India.
Though Bengal was never a good horse- breeding place, and the local horses ... import horses from Kamboja, an area reputed for the finest breed of horses ..