Sohgaura is not a Harappan site; it is associated with the later historical period, specifically linked to the ancient civilization of the Ganges Valley. In contrast, the Harappan Civilization, also known as the Indus Valley Civilization, flourished in the northwest regions of the Indian subcontinent from approximately 2600 to 1900 BCE, characterized by urban planning, advanced drainage systems, and a distinct script. Recognizing the boundaries and geographical spread of the Harappan sites is essential for understanding the broader context of ancient Indian history and the evolution of urban societies, which is crucial for UPSC Prelims preparation.