Among Kondadeo's reported reforms was a tax of one-fourth the cash equivalent of a land's yield, and the Fasli calendar was introduced at this time. He is said to have focused on the western Pune region, and has been credited with overseeing Shivaji's education and training. Kondadeo died in 1647, and Shivaji became his father's deputy. Many of Shivaji's comrades (and, later, a number of his soldiers) came from the Maval region in the district's western mountains, including Yesaji Kank, Suryaji Kakade, Baji Pasalkar, Baji Prabhu Deshpande and Tanaji Malusare. Shivaji traveled the hills and forests of the Sahyadri range with his Maval friends, acquiring skills and familiarity with the land which would be useful in his military career. Around 1645, the teenaged Shivaji first expressed his concept of Hindavi Swarajya (Indian self-rule) in a letter. According to legend, he took an oath to that effect at the temple of Raireshwar near Bhor in the district. Shivaji began his rule in 1648 of the Pune region, taking possession of the key Torna Fort and controlling the Chakan and Purandar forts and raiding Junnar. He moved his administration to the newly built Rajgad in 1648 and a year later, when Muhammad Adil Shah of Bijapur took Shahaji hostage, restrained his expansionist schemes. During the late 1640s and 1650s, Shivaji controlled the Pune district and beyond. Rajgad was his seat of government until his 1674 coronation. During the 1660s, the Mughals under Aurangzeb began paying attention to Shivaji. Pune and the region's forts frequently changed hands between the Mughals and Shivaji. In the Treaty of Purandar (1665), signed by the Mughal general Mirza Jaisingh and Shivaji, Shivaji ceded control of a number of forts in the district to the Mughals. Shivaji recaptured many of these forts when the truce ended. He was succeeded on the Marathi throne by his eldest son, Sambhaji, in 1680. Shortly afterwards, the Mughal army under Aurangzeb moved into the Deccan Plateau and remained there for nearly three decades. Sambhaji was captured and executed, at Aurangzeb's order, in the village of Tulapur at the confluence of the Bheema and Indrayani Rivers. According to other accounts, Sambhaji's remains were fed to dogs. The period following his 1689 death was one of political ferment in the Deccan Plateau, and the Pune region experienced major fluctuations in administrative authority. Shivaji's younger son, Rajaram I, ruled after his brother's death. He spent