Spartans Lost - Act 1 Side Quest
Start Location: Kephisos Valley
Quest Location: Athens Marsh
Objective: Speak with the lost group of soldiers then return to Isarchus
To begin this quest you will want to speak with Isarchus in Kephisos Valley; he's standing nearby the NPC who gives you the Trapped in the Ruins Side Quest. For this quest all you need to do is travel northeast through the Monster Encampment area and to the Athens Marsh.
Here you'll need to speak with Eryx to update the quest. After you've spoken to Eryx all you need to do is return to Isarchus in Kephisos Valley to turn it in. If you're having trouble finding any of the NPCs involved in this quest use the map screenshots on this page for further guidance.
Note: On Legendary difficulty a unique enemy called the Lernean Hydra can spawn in the Athens Swamp. This is one of the most popular farming locations in the game due to the Hydra having such a good loot table. For more information about this farming location check out my Lernean Hydra Farming Location Guide.
Lost group of Spartans in the Athens Marsh.