The Western Han (206 BCE – 9 CE) was the first major dynasty of the Han dynasty in ancient China. It followed the collapse of the Qin dynasty and is known for consolidating power, expanding territory, and establishing a centralized government. The capital was located in Chang'an, which became a cultural and economic hub. During the Western Han, significant advancements were made in areas such as agriculture, trade, and technology. The dynasty is also recognized for the development of the Silk Road, which facilitated trade between China and the West. The reign of Emperor Wu (141–87 BCE) marked a high point in military expansion and cultural achievements.