When did the ancient Indians first appear?

Ancient Indian civilization was discovered in 1922. Because its remains were first excavated in Halaba, India, which was the territory of the heyday of ancient India.

Usually called "halaba culture"; Because these sites are mainly concentrated in the Indus Valley, they are also called "Indus Civilization". The age of Halaba culture is about 2300 BC to 1750 BC. Halaba culture is the culture of the Bronze Age in ancient India, which represents a kind of urban civilization. Judging from the excavated urban sites, the planning and construction level of this city is quite high. For example, Yinghao City in Mohenjo, with an area of 260 hectares and divided into 12 blocks, has clean and wide streets, good drainage system, and some houses are exquisite and spacious, and has begun to enter the threshold of civilization. After hundreds of years, this civilization gradually declined and died out in the18th century BC. After the decline of Halaba culture, the Aryans, a nomadic people who invaded northwest India, established a more lasting civilization in India. Aryans appeared in northwest India around 2000 BC and gradually expanded to the south. By the early 6th century BC, it was said that India had formed 16 countries. After a long war of annexation, in the 4th century BC, a unified country centered on Mojeto was established in the Ganges River basin in the south. During this period, the Indus Valley in northwest India was invaded by the Persian Empire. Persians ruled the Indus Valley for nearly two centuries, and it was not until the late 4th century BC that they were conquered by Alexander of Macedonia. Chandragupta led the anti-Macedonian uprising, unified northern India after expelling the invaders, and quickly overthrew the Nantuo dynasty in Mojeto, thus establishing the most powerful peacock dynasty in ancient India. The peacock dynasty developed to its heyday in the time of Ashoka. After years of war, he extended the territory of the dynasty to the whole South Asian subcontinent except the southernmost tip of the Indian Peninsula, including India, Pakistan and Bangladesh today. This huge empire was established through military conquest. Therefore, it fell into division shortly after the death of Ashoka. In BC 187, the last king of the Peacock Dynasty was overthrown. Since then, the Indian Peninsula has never been unified.