Source A: Excerpt from Herodotus' Histories

'The Persians sought to expand their empire into Greece, and the Athenians and their allies refused to submit, leading to escalating tensions that culminated in the battle.'

Provenance: Herodotus, known as the 'Father of History', writing in the 5th century BCE.

Source B: Account of the Greek hoplites' tactics

'The Greek soldiers fought in a phalanx formation, which was highly effective against the Persian cavalry and archers.'

Provenance: Ancient Greek military historian describing Greek tactics in the 5th century BCE.

Source C: Ancient Greek historian Thucydides' view

'The victory at Marathon boosted Greek confidence and marked the beginning of their resistance against Persian domination.'

Provenance: Thucydides, historian of the 5th century BCE, known for his critical approach.