No Single Founding Moment
The Silk Road did not begin on a particular day, and nobody named it at the time. The label “Silk Road” (in German, Seidenstrasse) was coined by the geographer Ferdinand von Richthofen in 1877, nearly two thousand years after the events usually associated with its beginning. What really happened was more gradual: trade and contact between China, the steppe and the lands to the west built up over centuries, and after the Han dynasty rise from 206 BCE, its diplomacy in the 2nd century BCE gave that contact a lasting, state-backed form.
This is worth keeping in mind because popular accounts often describe Zhang Qian as the man who “discovered” or “opened” the route. The accurate version is that he gathered information that was new to the Han court and helped start a more organised relationship with the west, on paths that other peoples already knew.
Exchange Before the Han
Objects moved across Eurasia well before the Han. Jade from the Khotan region reached China during the Bronze Age, and horses, bronze technology and ideas moved among steppe communities over long distances. Some burials of the steppe, such as those at Pazyryk in the Altai mountains, contained Chinese textiles, including silk, from around the 5th century BCE. The Persian Achaemenid empire, with its roads and administration across western Asia, also linked regions that later joined the silk trade.
So when Han envoys set out, they entered a world where nomadic herders, oasis townspeople and distant states were already trading, raiding and negotiating.
The Problem of the Xiongnu
The Han reason for exploring westward was security. The Xiongnu confederation, a powerful alliance of steppe peoples to the north, had pressed Chinese borders for decades. The early Han tried to keep the peace with gifts and marriage alliances, but under Emperor Wu (reigned 141 to 87 BCE) the court looked for a more active approach.
Chinese sources report that the Xiongnu had driven a people called the Yuezhi from their lands, pushing them westward. Emperor Wu wanted to find the Yuezhi and propose an alliance against their common enemy.
Zhang Qian’s Journeys
Around 138 BCE, according to the main Chinese histories, Emperor Wu sent Zhang Qian west with a party of about a hundred men and a guide who knew the steppe. The Xiongnu captured them, and Zhang Qian was held for roughly ten years. He lived among the Xiongnu, was said to have married and had a son, and eventually escaped with his guide and continued on.
He travelled through Ferghana (which Chinese sources call Dayuan) and Sogdiana, and reached the Yuezhi, who had by then settled in the region of Bactria. They showed little interest in revenge, having found good land. Zhang Qian turned back around 128 BCE and was captured by the Xiongnu again, but escaped and returned to the Han capital around 126 BCE. Only he and his guide are said to have made it back.
The mission failed as an alliance and succeeded as a source of information. Zhang Qian reported on the states and peoples of the western regions, their cities, armies and goods. His account, preserved in the work of the historian Sima Qian and in later Han histories, described the large horses of Ferghana and noted goods from Bactria, including products which, he was told, had come from India. The Yuezhi, or one of their branches, later formed the basis of the Kushan Empire, an important power on the Silk Road.
Later Missions and Expansion
Around 119 BCE Zhang Qian led a second, larger embassy, this time toward the Wusun, a people in the Ili region. It also did not secure a lasting alliance, but he sent deputies on to neighbouring states, and Chinese embassies began to travel more regularly. He died around 114 BCE.
State power followed. After military campaigns against the Xiongnu, the Han created commanderies in the Hexi Corridor, among them Dunhuang, and extended walls and garrisons into the desert. Later in the 1st century BCE the Han established a Protectorate of the Western Regions to oversee the Tarim Basin oases, a region whose Tarim Basin mummies show human settlement long before. A campaign to obtain Ferghana’s horses in the years around 104 to 101 BCE showed how seriously the court took this region. Early wall and garrison work protected travellers and made official contact easier.
A Network That Grew for Centuries
After the Han, the network developed through the work of many others. Parthians and Kushans controlled stretches in the west and south. In the late 1st century CE a Han general, Ban Chao, restored Chinese influence in the Tarim Basin, and his envoy Gan Ying set out toward the west around 97 CE. Sogdian merchants, Buddhist monks and, later, Tang and Mongol rulers each shaped the routes in their own period.
That long development explains why historians prefer to speak of Silk Roads in the plural. Zhang Qian’s missions are an important starting point for the Chinese state’s knowledge of the west, but they were one chapter in a story that spread over many centuries and involved many peoples.
What the Sources Do and Do Not Tell Us
The details of Zhang Qian’s life come mostly from Chinese court histories written decades or more afterward. They are valuable but reflect Han interests. Numbers such as the size of his party, the years of captivity and the distances travelled should be read as reported figures, not precise records. Scholars also debate some of the places and peoples named in his report. The overall outline, however, is widely accepted.