Here is a brief timeline of the historical usage of the term "Indian":
1. Ancient Greece (5th century BCE): The term "Ἰνδός" was used by Greek historians and geographers, including Herodotus and Megasthenes, to refer to the people living in the Indus Valley region.
2. Alexander the Great's Invasion (326 BCE): When Alexander the Great invaded the Indian subcontinent, the Greek term "Ἰνδός" became more widely known in the Western world.
3. Roman Empire (1st century CE): The Romans adopted the Greek term "Indus" and used it to refer to the people and region of India.
4. European Explorations (15th-17th centuries): During the Age of Exploration, European explorers such as Christopher Columbus mistakenly referred to the indigenous peoples of the Americas as "Indians" when they believed they had reached Asia. This was due to a misinterpretation of the writings of ancient geographers and a misunderstanding of the world's geography.
5. Usage in the Americas: The term "Indian" became synonymous with the indigenous peoples of the Americas, referring to the various Native American tribes. This usage persists in many contexts, although some prefer alternative terms such as "Native American" or "Indigenous."
6. Modern Usage: In the present day, the term "Indian" is commonly used to refer to people from India and of Indian origin. It is also frequently employed to describe the culture, history, and heritage of the Indian subcontinent.