How did the capture of Amphipolis affect Athens?

The capture of Amphipolis by Philip II in 357 BCE significantly impacted Athens by depriving the city of a strategic location it had long sought to control for its access to timber, gold, and silver.12

Although Philip had kept the Athenians quiet during his assault by promising to hand the city over to them, he never fulfilled this pledge, instead distributing the territory to Macedonian feoffees. This loss exacerbated Athens's existing difficulties, as the city was already embroiled in the Social War against its own allies at the time. The capture of Amphipolis represented a major setback to Athenian interests in the north, and the city's inability to prevent Philip's subsequent expansion in the region highlighted its waning influence and the growing power of the Macedonian kingdom.2