During the next three emperors (1707–1719) who had brief reigns, the nobles became more and more powerful due to instability in the Delhi. The royals of Marwar were appointed viceroys frequently. During the reign of the emperor Muhammad Shah (1719–1748), the struggle between the Mughal and Maratha nobles were heightened with frequent battles and incursions. The south Gujarat was lost to the Marathas and the towns in north and central Gujarat was attacked on several occasions with frequent demand of tributes. The Marathas continued to grow their hold and the frequent change of viceroys did not reverse the trend. The competing houses of Marathas, Gaikwars and Peshwas engaged between themselves which slow down their progress for a while. They later made peace between themselves. During the reign of the next emperor Ahmad Shah Bahadur (1748–1754), there was nominal control over the nobles who acted on their own. There were frequent fights between themselves and with Marathas. Ahmedabad, the capital of province, fell to the Marathas in 1752. It was regained by noble Momin Khan for a short time but again lost to the Marathas in 1756 after a long siege. Finding opportunity, the British captured Surat in 1759. After a setback at Panipat in 1761, the Marathas strengthened their hold on Gujarat. During this fifty years, the power struggle between the Mughal nobles and Marathas caused disorder and the decline in prosperity.