The longest fight in recorded history is widely considered to be the Battle of Marathon in 490 BC, which lasted for approximately six hours.
While the exact duration of the battle is not definitively known, historical accounts suggest that the Athenian forces under the leadership of Miltiades fought bravely against the invading Persian army, ultimately achieving a decisive victory.
The battle, fought near the town of Marathon in Greece, involved a large number of soldiers on both sides, and the fighting was intense and prolonged.
The victory at Marathon marked a significant turning point in the Greco-Persian Wars, as it stopped the Persian advance into Greece and helped to preserve Athenian independence.
This victory also had a profound impact on the development of Athenian democracy and culture, and it has been celebrated in literature and art for centuries.
While there have been other battles that lasted for a longer period of time, such as the Battle of Verdun during World War I, which lasted for over 300 days, these battles were characterized by trench warfare and a stalemate, rather than the open and decisive engagement of the Battle of Marathon.
Therefore, the Battle of Marathon remains the longest single battle in recorded history, lasting for approximately six hours and having a significant impact on the course of history.