Alliance Mobilization is a mission event with a two-sided lock: one condition is yours, the other belongs to the alliance, and failing either one hides the event entirely.
Both gates have to be open
You need Town Center Lv. 10, and your alliance needs 15 or more members. A small, strong alliance is still locked out; so is a Lv. 9 lord in a full one. If the event is missing for you but visible to alliance-mates, it is your Town Center. If it is missing for everybody, count the roster.
Sources: Century Games’ English help centre — Alliance Mobilization — personal requirement · Alliance Mobilization — alliance requirement. Checked 2026-07-30.
Nine missions, and one button most people never find
Every player can accept missions 9 times by default, with extra attempts purchasable using Gems. That default is the number to plan around: nine is what a free player gets, so spending them on missions you can actually finish matters more than grinding any single one.
If a mission you cannot complete is occupying a slot, you are not stuck with it — tap the mission, choose Give Up, then Confirm, and it is deleted. Players routinely sit on an impossible mission for a whole event without realising this exists.
Sources: Century Games’ English help centre — How many missions you get · Giving up a mission. Checked 2026-07-30.