The Danes had not paid their rent. That was the core of it -- decades of unpaid tribute owed to the rulers of Thanjavur, the kingdom that had leased them this strip of coastline in 1620. By 1699, Shahuji I, the Maratha raja who now ruled Thanjavur, had had enough. He assembled his entire army -- between 20,000 and 30,000 men, including a thousand cavalry -- and marched on Tranquebar to take it back. Inside the walls, a small Danish garrison looked out at a force that outnumbered them by orders of magnitude and began to consider whether Fort Dansborg might be the last Danish building they would ever occupy.
The trouble stretched back to the original 1620 treaty between Christian IV of Denmark and Raghunatha Nayak of Thanjavur, which granted the Danes their coastal enclave in exchange for annual tribute payments. The Danish East India Company, however, was perpetually broke. It could barely maintain its trading operations, let alone keep current on rent to a local ruler whose patience had limits. The unpaid tributes led to a pattern of escalating disputes -- the Danes would default, the Nayak would threaten, some partial payment or diplomatic smoothing would buy time, and the cycle would repeat. By the late 1690s, the Thanjavur kingdom had passed from the Nayak dynasty to the Marathas, and Shahuji I saw no reason to continue tolerating Danish deadbeats on his coast. He resolved to end the arrangement permanently.
Shahuji's army began digging entrenchments a mile from the town walls, then worked their way forward with painstaking labor until their positions were within pistol-shot of the fortifications. The bombardment that followed nearly demolished one of Tranquebar's bastions, and an all-out assault appeared imminent. Danish Governor Claus Vogdt, watching his defenses crumble and his garrison's morale collapse, made a desperate calculation. Rather than fight to the last man, he sent an urgent appeal to the English East India Company at Madras, roughly 280 kilometers up the Coromandel Coast. The English -- rivals in trade but allies against the prospect of a European settlement falling to a local power -- agreed to help. It was a revealing moment: colonial solidarity, when it suited both parties, could override commercial competition.
By the time English reinforcements arrived, the Danish defenders had nearly given up. Plans were being drawn to abandon the town entirely and retreat into Fort Dansborg for a last stand. But the fresh troops changed the arithmetic. A sortie of 200 men launched from the walls immediately upon the English arrival. The fighting was chaotic and difficult at first -- the Thanjavur forces had been entrenching for weeks and were well-positioned. But the counterattack succeeded. The Indian army, caught off guard by the sudden aggression after weeks of passive Danish defense, pulled back from its trenches. The siege's momentum broke. Shahuji's forces did not storm the walls that day, and the opportunity for a decisive assault never returned.
Roughly six months after the English reinforcements arrived, the Danes and the Thanjavur Marathas signed a treaty. The terms reinstated the tribute payments the Danes had been dodging -- including the arrears -- while affirming Danish sovereignty over Tranquebar. Shahuji withdrew. The Mughal Emperor, whose nominal tributary the Thanjavur kingdom was, never intervened, apparently uninterested in a quarrel between a local raja and a minor European trading post. Tranquebar endured one more siege by the Nayak in 1718, but that attempt failed to breach the defenses, and the settlement was never seriously threatened again. The episode revealed the precariousness of small-scale European colonialism in India: a trading post sustained not by overwhelming force but by diplomatic maneuvering, timely alliances, and the willingness of other European powers to prop up a neighbor rather than watch a precedent be set.
The siege took place at Tranquebar (Tharangambadi), located at 11.029°N, 79.849°E on the Coromandel Coast of Tamil Nadu. Fort Dansborg, the Danish stronghold at the center of the siege, sits at the southern edge of town directly on the Bay of Bengal shoreline. The Thanjavur army's entrenchments would have stretched inland from the town, roughly a mile east before being advanced to the walls. Nearest major airport: Tiruchirappalli International (VOTR), approximately 125 km west. Chennai International (VOMM) is 280 km north along the same coast the English reinforcements would have traveled. Best viewed at 3,000-5,000 feet to appreciate how small the colonial settlement was relative to the surrounding agricultural landscape.