Earn Your Captain's Bars on the Frontier

The marauders have dug in deeper, and the frontier needs officers to match. A new rank opens above Lieutenant: clear all five of its difficulties and you take the field as Captain, against fifty tougher marauders at every tier. Lock in your rank and difficulty, then summon and defeat each foe alone, by rally or with alliance help, with a mini-boss every fifth level. Your rank carries over between events, and rewards grow with every level you reach.