If the 50-hour preparation period is over and the call-to-arms has been sounded, form a party of 8 members and speak with the militia captain to enter the instanced area.
I'm a bit unhappy about this. Does this mean only 8 people will be permitted per instance, or you must be in a group of 8 to enter the instance and more groups of players will be inside?

If it's just 8 people....meh....