<h2>Ancient Trade Routes that Shaped Civilisations</h2> <p>Long before modern highways and shipping lanes, a series of overland and maritime corridors linked the Indian sub‑continent with Central Asia, the Middle East and Europe. These routes moved not only commodities such as silk, tea, spices and incense, but also ideas, religions and technologies, leaving a lasting imprint on world history and on the UPSC syllabus.</p> <h3>Key Developments</h3> <ul> <li><strong>Silk Road</strong> – Originated under the <span class="key-term" data-definition="Han dynasty — Chinese imperial dynasty (206 BCE–220 CE) under which the Silk Road was formalised by Emperor Wudi, marking early Indo‑Eurasian connectivity (GS1: History)">Han dynasty</span> in the 2nd century BCE. Connected <span class="key-term" data-definition="Chang’an (modern Xi’an) – capital of the Western Han, the western terminus of the Silk Road (GS1: History)">Chang’an</span> with Rome, passing through Central Asian hubs like Samarkand and Bukhara, and Indian nodes such as Taxila and Peshawar. Peaked under the <span class="key-term" data-definition="Mongol Empire — 13th‑century empire that unified much of Eurasia, boosting Silk Road trade by providing security across vast territories (GS1: History)">Mongol Empire</span>, and declined after 15th‑century sea routes emerged.</li> <li><strong>Tea Horse Road</strong> – A mountainous network that began in southwest China (Dali, Lijiang) and reached Lhasa, then branched into India, Nepal and Bangladesh. The route facilitated the exchange of tea for horses, a critical military resource for China. Its origin dates to the Tang dynasty (618‑907 CE) and is documented by Buddhist monk <span class="key-term" data-definition="Yijing – Tang‑era monk whose travelogues provide early evidence of Tea‑Horse trade (GS1: History)">Yijing</span>.</li> <li><strong>Grand Trunk Road</strong> – Built by <span class="key-term" data-definition="Sher Shah Suri – 16th‑century ruler who constructed the Shahi Road linking the Indus to Bengal (GS1: History, GS2: Polity)">Sher Shah Suri</span> as the Shahi Road, later renamed by the British. Extends over 2,500 km from Bengal to Peshawar, and today runs from Chittagong (Bangladesh) to Kabul (Afghanistan). Recognised by <span class="key-term" data-definition="UNESCO — United Nations Educational, Scientific and Cultural Organization, which designates world heritage sites and recognises historic routes like the Grand Trunk Road (GS3: International Relations)">UNESCO</span> as a heritage corridor.</li> <li><strong>Incense (Caravan) Route</strong> – Originated in ancient Yemen, transporting frankincense and myrrh from the Arabian Peninsula to the Mediterranean. Developed from the 2nd millennium BCE to the 6th century CE, it fostered early urbanisation in South Arabia.</li> <li><strong>Spice Route</strong> – Linked the pepper‑growing Western Ghats of Kerala with ports on the Malabar Coast. At its height, the port of Muziris (now in Kerala)