This quest will expire upon the events at the end of Mechonis Field.
3rd Gate Front Line is a Timed Surprise Quest in Xenoblade Chronicles. It is received in Sword Valley, activated when the 3rd Gate is opened. The party must defeat the Reinforcement M104 near the 3rd Gate. This is also a Timed Quest and will become unavailable after reaching the end of Mechonis Field.
- "Defeat Reinforcement M104 near Gate 3."
"The war situation has improved a lot as a result of you defeating the Mechon reinforcements."