Explanation: Invasion by Alexander

• During Dana Nanda’s reign, Alexander invaded north-west India (327–325 BCE).
• In many ways, the invasion by Alexander is a watershed in Indian history.
• It marked the beginning of the interaction between India and the West, which spanned many centuries to follow.
• Greek historians began to write about India, and Greek governors and kings ruled in the north-western region of India, which introduced new styles of art and governance.
• After his conquests in the Punjab region, Alexander expressed his desire to march further east to attack the Magadha Empire.
• However, his already tired troops had heard about the great emperor in the east (Nanda) and his formidable army and refused to be engaged in a war against such a powerful adversary.

Source: Tamil Nadu Board Class 11