Shivaji was born in the hill-fort of Shivneri, near the city of Junnar in what is now Pune district. Scholars disagree on his date of birth. The government of Maharashtra lists 19 February as a holiday commemorating Shivaji's birth (Shivaji Jayanthi). Shivaji was named after a local deity, the goddess Shivai. Shivaji's father Shahaji Bhonsle was a Maratha general who served the Deccan Sultanates. His mother was Jijabai, the daughter of Lakhuji Jadhavrao of Sindhkhed, a Mughal-aligned sardar claiming descent from a Yadav royal family of Devagiri.

At the time of Shivaji's birth, power in Deccan was shared by three Islamic sultanates: Bijapur, Ahmednagar, and Golkonda. Shahaji often changed his loyalty between the Nizamshahi of Ahmadnagar, the Adilshah of Bijapur and the Mughals, but always kept his jagir (fiefdom) at Pune and his small army with him.

Upbringing

Shivaji was devoted to his mother Jijabai, who was deeply religious. His studies of the Hindu epics, the Ramayana and the Mahabharata, also influenced his lifelong defence of Hindu values. Shivaji was deeply interested in religious teachings, and regularly sought the company of Hindu and Sufi saints. Shahaji, meanwhile had married a second wife, Tuka Bai from the Mohite family. Having made peace with the Mughals, ceding them six forts, he went to serve the Sultanate of Bijapur. He moved Shivaji and Jijabai from Shivneri to Pune and left them in the care of his jagir administrator, Dadoji Konddeo. Dadoji has been credited with overseeing the education and training of young Shivaji.

Many of Shivaji's comrades, and later a number of his soldiers, came from the Maval region, 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, gaining skills and familiarity with the land that would prove useful in his military career. Shivaji's independent spirit and his association with the Maval youths did not sit well with Dadoji, who complained to Shahaji to no avail.

In 1639, Shahaji was stationed at Bangalore, which was conquered from the Vijayanagara nayaks, and asked to hold and settle the area. Shivaji was taken to Bangalore where he, his elder brother Sambhaji and his half brother Ekoji I were further formally trained. He married Saibai from the prominent Nimbalkar family in 1640. Around 1645, the teenage Shivaji first expressed his concept for Hindavi Swarajya (Indian self-rule), in a letter.

In 1645, the 15-year-old Shivaji bribed or persuaded Inayat Khan, the Bijapuri commander of the Torna Fort, to hand over possession of the fort to him. The Maratha Firangoji Narsala, who held the Chakan fort, professed his loyalty to Shivaji, and the fort of Kondana was acquired by bribing the Bijapuri governor. On 25 July 1648, Shahaji was imprisoned by Baji Ghorpade under the orders of Bijapuri ruler Mohammed Adilshah, in a bid to contain Shivaji.

According to Sarkar, Shahaji was released in 1649 after the capture of Jinji secured Adil-Shahi position in Karnataka. During these developments, from 1649–1655 Shivaji paused in his conquests and quietly consolidated his gains. After his release, Shahaji retired from public life, and died around 1664–1665 in a hunting accident. Following his father's release, Shivaji resumed raiding, and in 1656, under controversial circumstances, killed Chandrarao More, a fellow Maratha feudatory of Bijapur, and seized from him the valley of Javali.

Combat with Afzal Khan

Adilshah was displeased at his losses to Shivaji's forces, which his vassal Shahaji disavowed. Having ended his conflict with the Mughals and having a greater ability to respond, in 1657 Adilshah sent Afzal Khan, a veteran general, to arrest Shivaji. Before engaging him, the Bijapuri forces desecrated the Tulja Bhavani Temple, holy to Shivaji's family, and the Vithoba temple at Pandharpur, a major pilgrimage site for the Hindus.

Pursued by Bijapuri forces, Shivaji retreated to Pratapgad fort, where many of his colleagues pressed him to surrender. The two forces found themselves at a stalemate, with Shivaji unable to break the siege, while Afzal Khan, having a powerful cavalry but lacking siege equipment, was unable to take the fort. After two months, Afzal Khan sent an envoy to Shivaji suggesting the two leaders meet in private outside the fort to parley.

The two met in a hut at the foothills of Pratapgad fort on 10 November 1659. The arrangements had dictated that each come armed only with a sword, and attended by one follower. Shivaji, either suspecting Afzal Khan would arrest or attack him, or secretly planning to attack himself, wore armour beneath his clothes, concealed a bagh nakh (metal "tiger claw") on his left arm, and had a dagger in his right hand.

Accounts vary on whether Shivaji or Afzal Khan struck the first blow: Maratha chronicles accuse Afzal Khan of treachery, while Persian-language records attribute the treachery to Shivaji. In the fight, Afzal Khan's dagger was stopped by Shivaji's armour, and Shivaji's weapons inflicted mortal wounds on the general; Shivaji then fired a cannon to signal his hidden troops to attack the Bijapuri army. In the ensuing Battle of Pratapgarh fought on 10 November 1659, Shivaji's forces decisively defeated the Bijapur Sultanate's forces. More than 3,000 soldiers of the Bijapur army were killed and one sardar of high rank, two sons of Afzal Khan and two Maratha chiefs were taken prisoner.

After the victory, a grand review was held by Shivaji below Pratapgarh. The captured enemy, both officers and men, were set free and sent back to their homes with money, food and other gifts. Marathas were rewarded accordingly.

Siege of Panhala

Having defeated the Bijapuri forces sent against him, Shivaji's army marched towards the Konkan and Kolhapur, seizing Panhala fort, and defeating Bijapuri forces sent against them under Rustam Zaman and Fazl Khan in 1659. In 1660, Adilshah sent his general Siddi Jauhar to attack Shivaji's southern border, in alliance with the Mughals who planned to attack from the north. At that time, Shivaji was encamped at Panhala fort with his forces. Siddi Jauhar's army besieged Panhala in mid-1660, cutting off supply routes to the fort. During the bombardment of Panhala, Siddi Jahuar purchased grenades from the British at Rajapur to increase his efficacy, and also hired some English artillerymen to bombard the fort, conspicuously flying a flag used by the English. This perceived betrayal angered Shivaji, who in December would exact revenge by plundering the English factory at Rajapur and capturing four of the factors, imprisoning them until mid-1663.

Accounts vary as to the end of the siege, with some accounts stating that Shivaji escaped from the encircled fort and withdrew to Ragna, following which Adilshah personally came to take charge of the siege, capturing the fort after four months. Other accounts state that after months of siege, Shivaji negotiated with Siddi Jahuar and handed over the fort on 22 September 1660, withdrawing to Vishalgad;^:99 Shivaji would later re-take Panhala in 1673.

Battle of Pavan Khind