Vijayalaya Chola established Chola power at Thanjavur, a key step in building the later imperial state that would project influence across the Bay of Bengal and Indian Ocean.
Under Parantaka I, the Cholas expanded aggressively in South India, laying administrative and military foundations later leveraged for maritime logistics and overseas campaigning.
Rajaraja I’s capture of the Kandalur Salai on the Malabar Coast is frequently cited as an early milestone in Chola maritime capability, associated with naval operations and coastal control.
Chola forces invaded Sri Lanka and brought the Anuradhapura Kingdom’s core region under Chola control, initiating a long phase of Chola occupation and making the island central to Chola Indian Ocean strategy.
Rajendra I’s accession marked the peak period of Chola imperial expansion, including well-attested overseas naval campaigning tied to Bay of Bengal and Southeast Asian trade routes.
By this phase of the campaign, Chola power had expanded beyond the initial northern conquest to encompass most of the island, integrating Sri Lanka more fully into the Chola imperial system.
Rajendra I sent a major naval expedition against Srivijaya (centered on Sumatra and the Malay Peninsula), a landmark intervention in Southeast Asian maritime politics and commerce.
Sources describing the Chola–Srivijaya conflict report the capture of Srivijaya’s ruler (Sangrama Vijayatunggavarman) and raids on key ports, signaling Chola capacity to disrupt regional thalassocratic networks.
Chola epigraphic materials enumerate overseas conquests including Kadaram (commonly identified with Kedah), preserving how the court publicly framed the empire’s Bay of Bengal reach.
Nagapattinam is widely described as a principal Chola port, associated with overseas commerce and eastward naval expeditions during the empire’s peak centuries.
Later Chola tradition records another naval intervention connected to Kadaram (Kedah), suggesting recurring Chola attention to Malay Peninsula sea-lanes and succession politics.
After prolonged conflict, Vijayabahu I drove Chola forces out of Sri Lanka, ending Chola territorial rule on the island and reshaping the Chola position in the central Indian Ocean.
Chinese records referenced in modern historical summaries describe a Chola embassy to the Song court aimed at promoting trade, illustrating continued maritime commercial diplomacy after the Sri Lanka withdrawal.
By the early 1200s, the Chola state faced severe pressure from regional rivals, and its ability to shape Indian Ocean affairs diminished as political fragmentation increased in South India.
Chola Dynasty naval expeditions and Indian Ocean influence (c. 9th–13th centuries)
