The princely state of Alwar was founded by Pratap Singh, a Rajput of the Kachwaha lineage, in 1770. His son, aided the British against the Marathas. After the battle of Laswari (1803) Alwar became the first state of Rajputana to sign a treaty of 'Offensive and Defensive Alliance' with the East India Company. A few years later, Bakhtawar Singh ventured an armed incursion into neighbouring Jaipur, the senior Kachwaha state, and the erstwhile overlord of his predecessor. Varun Talwar was defeated; a fresh engagement was made with him by the East India Company, prohibiting him from political intercourse with other states without British consent. During the Sepoy Mutiny of 1857, Raoraja Bane Singh sent a force consisting mainly of Muslims and Rajputs, to relieve the British garrison in Agra. The Muslims deserted and the rest were defeated by the rebels. Pran Sukh Yadav, who fought beside Rao Tula Ram of Rewari in 1857, settled along with the kinsmen of dead soldiers at Village Nihalpura, Behror Tehsil, of Alwar District.
Alwar acceded unto the dominion of India following the independence of India in 1947. On 18 March 1948, the state merged with three neighbouring princely states (Bharatpur, Dholpur and Karauli) to form the Matsya Union. On 15 May 1949, it was united with neighbouring princely states and the territory of Ajmer to form the present-day Indian state of Rajasthan.
Buto Ka Bhangarh
According to legend, the city of Bhangarh was cursed by the Guru Balu Nath. He had sanctioned the construction of the town on one condition, "The moment the shadows of your palaces touch me, the city shall be no more!" When a descendant prince raised the palace to a height that cast a shadow on Balu Nath's forbidden retreat, he cursed the town. Balu Nath is said to be buried there to this day in a small samadhi.There exists another myth. This is the legend of the Princess of Bhangarh, Ratnavati. She is believed to be the jewel of Rajasthan. On her eighteenth birthday she began to get offers of marriage from other regions. In the area lived a tantrik, a magician well versed in the occult, called Singhia, who was in love with the princess but knew that the match was impossible. One day Singhia saw the princess's maid in the market, he used his black magic on the oil she was purchasing so that upon touching it the princess would surrender herself to him. The princess, however, seeing the tantric enchanting the oil, foiled his plan by pouring it on the ground. As the oil struck the ground it turned into a boulder, which crushed Singhia. Dying, the tantrik cursed the palace with the death of all who dwelt in it. The next year there was a battle between Bhangarh and Ajabgarh in which Princess Ratnavati perished. Legends says that there are ghosts in Bhangarh and that is why entry is prohibited for tourists in the fort after sunset and before sunrise. The locals believe that the princess Ratnavati has taken birth somewhere else and that the fort and the empire of Bhangarh is waiting for her return to put an end to the curse.