Contemporary Jijasena's Harivamsha purana describes him as "master of western quarter"[5] According to Radhanpur Plate Inscription and Prithviraja Vijaya, Vatsaraja led an expedition against the distant eastern kingdom of Bengal, ruled by the Palas under Dharmapala.
According to above inscription Dharamapala, was deprived of his two white Royal Umbrellas, and fled, pursued by the Pratihara forces under Vatsaraja's General Durlabhraj Chauhan of Shakambhari.
Through vigorous campaigning, Vatsraja had extended his dominions to include a large part of northern India, from the Thar Desert in the west up to the frontiers of bengal in the east.
[8] The evidence of the 795 CE inscription of his subordinate, brought to light by Shanta Rani Sharma, presents a detailed record of his victories over the Arabs, Indrāyudha and Bengal.
The Chahamana king Durlabharaja, described in the Prithviraja Vijaya as having bathed his sword at the confluence of the Ganga and the ocean, was a subordinate of Vatsaraja.