What river was in Central Asia that helped the spread of Buddhism?

The River Amu Darya, historically known as the Oxus River, played a significant role in Central Asia's geography and culture, facilitating trade and the movement of ideas, including Buddhism. It served as a crucial artery for merchants and travelers along the Silk Road, which contributed to the dissemination of Buddhist teachings throughout the region. The river's surrounding areas became important centers for Buddhist monasteries and communities, helping to establish and spread the religion in Central Asia.