Mahajanapadas in the context of "Magadha"

Anatomically modern humans first arrived on the Indian subcontinent between 73,000 and 55,000 years ago. The earliest known human remains in South Asia date to 30,000 years ago. Sedentariness began in South Asia around 7000 BCE; by 4500 BCE, settled life had spread, and gradually evolved into the Indus Valley Civilisation, one of three early cradles of civilisation in the Old World, which flourished between 2500 BCE and 1900 BCE in present-day Pakistan and north-western India. Early in the second millennium BCE, persistent drought caused the population of the Indus Valley to scatter from large urban centres to villages. Indo-Aryan tribes moved into the Punjab from Central Asia in several waves of migration. The Vedic Period of the Vedic people in northern India (1500–500 BCE) was marked by the composition of their extensive collections of hymns (Vedas). The social structure was loosely stratified via the varna system, incorporated into the highly evolved present-day Jāti system. The pastoral and nomadic Indo-Aryans spread from the Punjab into the Gangetic plain. Around 600 BCE a second urbanization occured resulting in a new interregional culture; then, smaller janapadas (realms) were consolidated into mahajanapadas (great states). This period saw the rise of new ascetic movements and religious concepts, including the rise of Jainism and Buddhism. The latter was synthesized with the preexisting religious cultures of the subcontinent, giving rise to Hinduism.

Chandragupta Maurya overthrew the Nanda Empire and established the first great empire in ancient India, the Maurya Empire. India's Mauryan king Ashoka is widely recognised for the violent Kalinga War and his historical acceptance of Buddhism and his attempts to spread nonviolence and peace across his empire. This period marks the rapid dissemination of Śramaṇic religions.

The Janapadas (lit. 'Foothold of the people') (pronounced [janapada]) (c. 1100–600 BCE) were the realms, republics (janapada) and kingdoms (sāmarājya) of the Vedic period in the Indian subcontinent. The Vedic period reaches from the late Bronze Age into the Iron Age: from about 1500 BCE to the 6th century BCE. With the rise of sixteen Mahajanapadas ("great janapadas"), most of the states were annexed by more powerful neighbours, although some remained independent.

Janapadas were the kingdoms and republics of Vedic India from the late Bronze Age to the Iron Age (c. 1200 BCE to 6th century BCE). Emerging from settled agricultural communities, they were originally named after the dominant "Jana" (people/tribe). With the spread of iron tools, these smaller kingdoms grew in size and power, eventually evolving into the larger Mahajanapadas.

Taxila (Punjabi: ٹيکسلا, romanized: Ṭeksilā), historically known as Takshashila, is a city and UNESCO World Heritage Site on the Pothohar Plateau of Punjab, Pakistan. Founded around c. 1000 BC, it is one of the oldest cities in South Asia. Taxila is located within the Taxila Tehsil of Rawalpindi District in northern Punjab, and it lies approximately 25 kilometres (16 mi) northwest of the Islamabad–Rawalpindi metropolitan area and is just south of the Haripur District of Khyber Pakhtunkhwa.

Established during the Vedic period, Old Taxila was for a time the capital city of ancient Gandhāra. Situated on the eastern shore of the Indus River—the pivotal junction of the Indian subcontinent and Central Asia—it was possibly founded around 1000 BCE. Takshashila and Pushkalavati remained prominent cities in Gandhāra during the Mahajanapadas. The city is believed to have become part of the Achaemenid Empire during 550 – 326 BCE. In 326 BCE, it was claimed by Alexander the Great, after overthrowing the Achaemenids. Alexander gained control of the city without a battle since it immediately surrendered to his Macedonian Empire. This was followed successively by the Mauryans (~317 – ~200 BCE), the Indo-Greeks (~200 BCE – ~55 BCE), the Indo-Scythians (~80 BCE – ~30 CE), and the Kushan Empire (~30 CE – ~375 CE), who destroyed the existing city, in the first century CE, to build their own on a site to the north of the ruins. Owing to its strategic location, Taxila has changed hands many times over the centuries, with many polities vying for its control. When the great ancient trade routes connecting these regions ceased to be important, the city sank into insignificance and was finally destroyed in the 5th century by the invading Hunas. In mid-19th century British India, ancient Taxila's ruins were rediscovered by British archaeologist Alexander Cunningham and extensively excavated by Sir John Marshall. In 1980, UNESCO designated Taxila as a World Heritage Site. The area was part of the ancient Gandhara region. Taxila (ancient city) was designated a UNESCO World Heritage Site in 1980 and is located in the town of Taxila.

In the prehistory of the Indian subcontinent, the Iron Age succeeded Bronze Age India and partly corresponds with the megalithic cultures of South India. Other Iron Age archaeological cultures of north India were the Painted Grey Ware culture (1300–300 BCE) and the Northern Black Polished Ware (700–200 BCE). This corresponds to the transition of the Janapadas or principalities of the Vedic period to the sixteen Mahajanapadas or region-states of the early historic period, culminating in the emergence of the Maurya Empire towards the end of the period.

The earliest evidence of iron smelting predates the emergence of the Iron Age proper by several centuries.

Punjab (/pʌnˈdʒɑːb/ pun-JAHB; Punjabi: pañjāba, pronounced [pəɲˈd͡ʒaːb] ) is a state in northwestern India. Forming part of the larger Punjab region of the Indian subcontinent, the state is bordered by the Indian states of Himachal Pradesh to the north and northeast, Haryana to the south and southeast, and Rajasthan to the southwest; by Indian-administered Jammu and Kashmir to the north and Chandigarh to the east. To the west, it shares an international border with the identically named Pakistani province of Punjab, and as such is sometimes referred to as East Punjab or Indian Punjab for disambiguation purposes. The state covers an area of 50,362 square kilometres (19,445 square miles), which is 1.53% of India's total geographical area, making it the 19th-largest Indian state by area out of 28 Indian states (20th largest, if Union Territories are considered). With over 27 million inhabitants, Punjab is the 16th-largest Indian state by population, comprising 23 districts. Punjabi, written in the Gurmukhi script, is the most widely spoken and the official language of the state. The main ethnic group are the Punjabis, with Sikhs (57.7%) and Hindus (38.5%) forming the dominant religious groups. The state capital, Chandigarh, is a union territory and also the capital of the neighboring state of Haryana. Three of the five traditional Punjab rivers — the Sutlej, Beas, and Ravi — flow through the state.

The history of Punjab has witnessed the migration and settlement of different tribes of people with different cultures and ideas, forming a civilisational melting pot. The ancient Indus Valley Civilisation flourished in the region until its decline around 1900 BCE. Punjab was enriched during the height of the Vedic period, but declined in predominance with the rise of the Mahajanapadas. The region formed the frontier of initial empires during antiquity including Alexander's and the Maurya empires. It was subsequently conquered by the Kushan Empire, Gupta Empire, and then Harsha's Empire. Punjab continued to be settled by nomadic people; including the Huna, Turkic and the Mongols. Punjab came under Muslim rule c. 1000 CE, and was part of the Delhi Sultanate and the Mughal Empire. Sikhism, based on the teachings of Sikh Gurus, emerged between the 15th and 17th centuries. Conflicts between the Mughals and the later Sikh Gurus precipitated a militarisation of the Sikhs, resulting in the formation of a confederacy after the weakening of the Mughal Empire, which competed for control with the larger Durrani Empire. This confederacy was united in 1801 by Maharaja Ranjit Singh, forming the Sikh Empire.

The Northern Black Polished Ware culture (abbreviated NBPW or NBP) is an urban Iron Age Indian culture of the Indian subcontinent, lasting c. 700–200 BCE (proto NBPW between 1200 and 700 BCE), succeeding the Painted Grey Ware culture and Black and red ware culture. It developed beginning around 700 BCE, in the late Vedic period, and peaked from c. 500–300 BCE, coinciding with the emergence of 16 great states or Mahajanapadas in Northern India, and the subsequent rise of the Mauryan Empire.

Recent archaeological evidences have pushed back NBPW date to 1200 BCE at Nalanda district, in Bihar, where its earliest occurrences have been recorded and carbon dated from the site of Juafardih. Similarly sites at Akra and Ter Kala Dheri from Bannu have provided carbon dating of 900-790 BCE and 1000-400 BCE, and at Ayodhya around 13th century BC or 1000 BCE.

Ujjain (/uːˈdʒeɪn/ , Hindi: [ʊd͡ːʒɛːn̪], Hindi: [əʋən̪t̪ɪkaː]), also known as Ujjayini, is a city in Ujjain district of the Indian state of Madhya Pradesh. It is the fifth-largest city in Madhya Pradesh by population and is the administrative as well as religious centre of Ujjain district and Ujjain division. It is one of the Hindu pilgrimage centres of Sapta Puri famous for the Kumbh Mela (Simhastha) held there every 12 years. The ancient and world famous temple of Mahakaleshwar Jyotirlinga is located in the center of the city. The city has been one of the most prominent trade and political centres of the Indian subcontinent from the time of the ancient Mahājanapadas until the British colonisation of India.

An ancient city situated on the eastern bank of the Shipra River, then known as Avantika,, it was the most prominent city on the Malwa plateau of central India for much of its history. It emerged as the political centre of central India around 600 BCE. It was the capital of the ancient Avanti kingdom, one of the sixteen Mahājanapadas. During the 18th century, the city briefly became the capital of the Scindia state of the Maratha Confederacy, when Ranoji Scindia established his capital at Ujjain in 1731. It remained an important political, commercial, and cultural centre of Central India until the early 19th century, when the British administrators decided to develop Indore as an alternative to it. Ujjain continues to be an important place of pilgrimage for Shaivites, Vaishnavites and Shaktas. Bathing in the holy Shipra river of Ujjain liberates one from sins. Therefore, Ujjain is also called the 'Mokshadayini city'. The name of this river is taken among the holy rivers like Kaveri, Narmada, Godavari and Krishna.

Kosala (IPA: [koːɕɐlɐ]), sometimes referred to as Uttara Kosala (lit. 'Northern Kosala') was one of the Mahajanapadas of ancient India. It emerged as a small state during the Late Vedic period and became (along with Magadha) one of the earliest states to transition from a lineage-based society to a monarchy. By the 6th century BCE, it had consolidated into one of the four great powers of ancient northern India, along with Magadha, Vatsa, and Avanti.

Kosala belonged to the Northern Black Polished Ware culture (c. 700–300 BCE) and was culturally distinct from the Painted Grey Ware culture of the neighboring Kuru-Panchala region, following independent development toward urbanisation and the use of iron. The presence of the lineage of Ikshvaku—described as a raja in the Ṛgveda and an ancient hero in the Atharvaveda—to which Rama, Mahavira, and the Buddha are all thought to have belonged—characterized the Kosalan realm.