Long before European ships appeared on the horizon, Con Son was already entangled in the power struggles of maritime Southeast Asia. During the Chenla period, fleets from the Shailendra dynasty -- Javanese, Sumatran, or Malay, depending on which inscription you read -- seized the island and used it as a staging ground for raids against the kingdom of Champa and settlements along the Chinese coast. The island's position made it a natural base for anyone who could hold it: sheltered harbors, fresh water, and a commanding view of shipping lanes that funneled trade between China, India, and the Spice Islands. Piracy gave way to diplomacy when, in 1787, the Vietnamese prince Nguyen Anh -- the future Emperor Gia Long -- promised to cede the island to France through the Treaty of Versailles. In exchange, Louis XVI pledged 1,650 troops to help Nguyen Anh reclaim his throne. The deal was never fully executed, but it established a French claim that would echo across the next two centuries.

Before the French arrived in force, the English tried their hand at Con Son. In 1702, the English East India Company founded a settlement they called Pulo Condore, adapting the Malay name. The settlement lasted three years. In 1705, the garrison was destroyed -- the historical record is sparse on exactly how, but the outpost vanished, and the English did not return. It was a brief footnote in the island's long history, but it underscored the same lesson the pirates had already learned: holding a small island at a busy crossroads requires more than a flag and a few buildings. It requires the sustained will to defend it, and the English had other priorities across a rapidly expanding empire.

In 1861, the French colonial government transformed Con Son's isolation from a strategic advantage into a punishment. They established Con Dao Prison on the island to house political prisoners -- men and women whose crime was opposing French rule in Indochina. The prison would operate for over a century, under two different regimes. Among those held in the 1930s were Pham Van Dong, who would become North Vietnam's longest-serving prime minister; Nguyen An Ninh, the journalist and revolutionary; and Le Duc Tho, who would later share the Nobel Peace Prize with Henry Kissinger for negotiating the Paris Peace Accords (Tho refused the prize). When France withdrew from Indochina in 1954, the South Vietnamese government took over Con Dao Prison and continued its function. The infamous 'tiger cages' -- cramped stone cells where political prisoners were held in conditions designed to break them -- became a symbol of the brutality that persisted on the island across colonial and postcolonial eras alike.

While the prison held bodies, another installation on the island's northern end served a different purpose. Station Con Son was one of five navigation stations in a Southeast Asia chain, designated SH-3 Yankee. Built by Morrison-Knudsen Corp. and Brown and Root Company, it featured a 625-foot tower, transmitter buildings, fuel tanks, and barracks. The station provided precise all-weather positioning signals that allowed aircraft and ships to navigate the South China Sea accurately. In January 1973, its operation was transferred to civilian contractors under United States Coast Guard oversight. The station's final hours came on April 29, 1975, as South Vietnam fell. Ordered to stay on the air as long as possible, Station Con Son broadcast navigation signals to aircraft and ships fleeing the country until 12:46 local time. Then the crew deliberately over-sped the generators and destroyed critical electronic equipment, denying the facility to advancing forces. It was the last signal many evacuees followed to safety.

Con Son has been mapped by the Chinese, the Javanese, the Arabs, the Portuguese, the Malay, the English, the French, the Americans, and the Vietnamese. Each culture saw in the island what it needed: a pirate haven, a trading post, a prison, a navigation beacon. The Con Dao archipelago is now a national park and a growing tourist destination, its prison preserved as a memorial, its waters designated for marine protection. Visitors come for the beaches, the diving, and the sea turtles that nest on its shores. But the island's layered history -- visible in the ruins of colonial architecture, the crumbling prison walls, and the foundation of the American navigation tower -- refuses to simplify itself into any single story. Con Son remains what it has always been: a small island that, by accident of geography, has absorbed the ambitions and violence of every empire that sailed past it.