The Warbands league and Tempest league ran from July 10, 2015 to October 2, 2015, launched alongside The Awakening expansion.
Warring clans have spread throughout Wraeclast. During your travels, you'll occasionally encounter one of their Warbands - A tight-knit group of enemies who cooperate to take you down.
The Warbands league was a challenge league. In the Warbands league, warring clans spread throughout Wraeclast. These warbands are tight-knit groups of enemies who cooperate and use synergistic skills to take you down. At higher levels, elite and leader enemies were present, who directed their Warband in combat and could take matters into their own hands if the tide of battle turned against them. Each of the three Warbands had exclusive Unique Items that only drop from them. The presence of the warbands in Wraeclast fluctuated over time and responds to the Exiles' efforts to hunt them.
It started along with the Tempest league on July 10, 2015. Both leagues ended October 2, 2015. At the end of the league all characters and stashes were moved to Standard league. Characters that died during the four months respawned in Warbands.