Megiddo overlooked the fertile Jezreel Valley near the outlet of Wadi Ara, one of the important routes between the coastal plain and the interior. Its advantages were commercial, agricultural and military. The city did not control the only possible passage between Egypt and Asia, but its position made it valuable to powers seeking influence over the region. Settlement began in the Neolithic, and later rebuilding produced a tell: a mound formed from the remains of successive occupations. Its layers are not twenty-six identical cities, each destroyed in the same way. They preserve different phases of growth, rebuilding, destruction and changing use.

The campaign of Thutmose III made Megiddo central to Egyptian royal memory. In his twenty-third regnal year, often dated to 1457 BCE, the pharaoh advanced against a coalition led by the ruler of Kadesh. His annals describe a debate over the approach and the king's decision to take the narrow route through Aruna. They present the choice as a demonstration of royal courage and judgement. After the fighting, Egyptian soldiers plundered the defeated enemy's camp rather than immediately taking the city, allowing defenders to reach safety. Megiddo then endured a siege, traditionally described as lasting seven months. The account is unusually detailed, but it is still a royal victory narrative rather than an impartial military report.

Egyptian power at Megiddo also appears in less triumphant documents. The Amarna Letters preserve messages from Biridiya, the city's ruler in the fourteenth century BCE. His correspondence concerns political danger, neighbouring rivals and obligations to the Egyptian king. These letters place the city within a network of local rulers who negotiated, complained and sought assistance from the pharaoh. They show that imperial control depended on communication and cooperation as well as victories. The voices of the royal annals and the diplomatic tablets are different: one celebrates conquest, while the other exposes the continuing demands of government.

The Iron Age remains include monumental architecture, fortifications and a water system designed to give access to a spring from within the defended settlement. The six-chambered gate and buildings conventionally called stables became famous through their association with Solomon. Yet the dating of particular structures and their connections with biblical rulers remain subjects of archaeological debate. A literary reference to Solomon's building at Megiddo does not automatically identify every excavated gate or stable as his work. Changes in stratigraphic interpretation and chronology matter because structures now visible together can belong to different phases of the city's life.

Megiddo entered the Neo-Assyrian imperial system following the campaigns of Tiglath-Pileser III in the eighth century BCE. Another encounter with Egyptian power became central to biblical memory: Josiah of Judah died in connection with Necho II's campaign in 609 BCE. The biblical accounts should not be merged into a single detailed eyewitness story. Second Kings describes Josiah being killed at Megiddo and his body taken to Jerusalem; Second Chronicles describes him being wounded by archers and dying after he was brought to Jerusalem. Both associate his death with the confrontation, but they frame and narrate it differently.

The name Armageddon appears in Revelation 16:16 as the place where the kings are assembled. It is usually explained through the Hebrew Har Megiddo, Mount Megiddo, although the precise significance of the name has been discussed in different ways. Revelation's use belongs to religious symbolism, not to archaeological proof of a future battle. The tell's own occupation history continued beyond the date of Jerusalem's destruction in 586 BCE: limited settlement survived into the Persian period. Later activity in the surrounding area, including Roman Legio and nearby early Christian remains, should be distinguished from occupation of the ancient mound itself.

Modern excavation began with Gottlieb Schumacher's work in 1903-1905 and continued through the University of Chicago expedition of 1925-1939 and later research. Palaces, carved ivories, gates and the water system have made the site central to the study of ancient urban life. Megiddo was inscribed on the World Heritage List in 2005 together with Hazor and Beer Sheba. Its importance does not depend on every discovery confirming a familiar text. The archaeological record, Egyptian inscriptions and biblical traditions each contribute evidence, but they must be compared with attention to the different questions they can answer.