He was succeeded by his brother, Karm Parkãsh, a weak ruler, whose misconduct caused a serious revolt. To suppress this he rashly invoked the aid of the Gurkhas, who promptly seized their opportunity and invaded Sirmür, expelled Ratn Parkash, whom the rebels had placed on the throne, and then refused to restore Karm Parkash. His queen, a princess of Goler and a lady of courage and resource, took matters into her own hands and invoked British aid. Her appeal coincided with the declaration of war against Nepal by the British, and a force was sent to expel the Gurkhas from Sirmür, On the conclusion of the Gurkha War the British Government placed Fateh Parkash, the minor son of Karm Parkãsh, on the throne, annexing all the territories east of the Jumna with Kotaha and the Kiãrda Dan. The Dun was, however, restored to the State in 1833 on payment of Rs.50,000. During the first Afghan War the Raja aided the British with a loan, and in the first Sikh War a Sirmur contingent fought at Hari-ka-pattan. Under Raja Sir Shamsher Parksh, G.C.S.I. (1856—98), the State progressed rapidly. Begar (forced labour) was abolished, roads were made, revenue and forest settlements carried out, a foundry, dispensaries, post and telegraph offices established. In 1857 the Raja rendered valuable services, and in 1880 during the Second Afghan War he sent a contingent to the north-west frontier. The Sirmür Sappers and Miners under his second son, Major Bir Bikram Singh, C.I.E., accompanied the Tirãh expedition in 1897.