In 1459, Rao Jodha of the famous Rathore clan of the Rajputs moved the capital of the Marwar principality several kilometers from the vulnerable site of Mandore to a gigantic steep-sided escarpment, where he named his new capital after himself. Thus was born Jodhpur. He built a highly barricaded fort which proved virtually impregnable, and the city soon become a great center of trade and commerce due to its strategic location on the Delhi - Gujarat trade route. As a result prosperity reigned supreme in the region. However, the ecstasy was not without agony. The progress and prosperity invited the jealousy of the Mughals who also coveted the riches and the territory of the once largest Rajput state in Rajasthan. But given the impregnability of the fort and his policy of maintaining harmonious relations with the Rajputs, the Mughal Emperor Akbar thought it prudent not to attack the principality and instead entered into marriage alliance with the Rathores. A marriage alliance between Udai Singh's sister and Akbar in 1561 ensured the most friendly of terms.