The Marathas launched annual attacks on the Janjira fort but failed to capture it each time, suffering significant losses.

In 1676, the Maratha Peshwa Moropant faced a major setback when Siddi Qasim, with the Mughal fleet, launched a surprise attack on the besiegers.

With Shivaji's rise and the subsequent decline of Bijapur Sultanate as an independent state, along with the loss of one of their more distant forts to the Marathas, the Siddis of Janjira shifted their allegiance to the Mughal Empire.

They controlled sea forts and sizable nearby land holdings, and maintained a substantial navy to safeguard their merchant shipping.

Despite the Marathas being preoccupied with battling stronger adversaries, they consistently restrained the Siddis, reclaiming any new territories they had acquired and imposing new alliances on them.

[5] In 1648, aided by Maratha commanders who penetrated the Konkan from behind the Sahyadri mountains, Shivaji managed to capture the Kolaba forts of Tala, Gosala, and Raigarh.

[7] By 1661, the Bijapur general Fateh Khan decided to surrender Janjira to Shivaji due to the relentless attacks by the Marathas.

[13] Siddi Qasim arrived with a Mughal fleet consisting of 300 men and successfully destroyed Moropant Pingale's floating batteries, forcing him to retreat to Raigarh.

[14][15] The invasions of Janjira led Shivaji to recognize the significance of naval power, prompting him to construct a fleet of small, fast ships.

Despite expanding control in the Konkan region, Shivaji's inability to defeat the Siddis during his reign persisted due to ineffective artillery.

[4] In the years following Shivaji's death, the Siddis had expanded their landholdings to encompass much of the central and northern Konkan coastal plains.

[16] Janjira Fort was the only location along the Konkan coast that neither Shivaji nor Kanhoji nor any of their combined seven sons were able to defeat, capture, control, or administer.