[1] Historical evidence suggests that Durlabha achieved military success against the Pala Empire of present-day Bengal, as a vassal of the Gurjara-Pratihara king Vatsaraja.
[2] The Prithviraja Vijaya states that Durlabha's sword bathed in Ganga-sagara (presumably the confluence of the Ganga river and the ocean), and tasted the sweet juice of Gauda.
[4][5] This theory is supported by the Radhanpur Plate Inscription, which refers to Vatsaraja's successful military campaign in the Gauda region.
Other historians, such as Dasharatha Sharma and Rima Hooja, identify it with the Gauda region in Bengal, which was the core Pala territory.
The inscription suggests that through vigorous campaigning, Vatsraja 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.