Why is the battle of marathon known as the single most important battle in Greek history?

The Battle of Marathon, fought in 490 BC, is considered pivotal in Greek history because it marked a significant victory for the outnumbered Athenian forces against the Persian Empire, which was then the dominant power in the region. This battle not only boosted Greek morale and unity but also laid the groundwork for the eventual rise of Athens as a major cultural and political center. The victory at Marathon is often seen as a turning point that helped preserve Greek independence and democratic ideals, ultimately influencing Western civilization.