 Historian James Todd mentions that there was a one Rajasthani tradition that mentions the immigration of Rajputs from Mewar to Himalayas in the late 12th century after the battle between Chittor and Muhammad Ghori.Historian John T Hitchcock and John Whelpton contends that the regular invasions by Muslims led to heavy influx of Rajputs with Brahmins from the 12th century.The entry of Rajputs in central region of what is today Nepal were easily assisted by Khas Malla rulers who had developed a large feudatory state covering more than half of the Greater Nepal.