With Patch 5.35 bringing the Bozjan Southern Front to Final Fantasy XIV players will be able to upgrade their Resistance Weapons and here's how you can unlock this new 72 players instanced duty.
FFXIV 5.35 Unlocking the Bozjan Southern Front
To unlock the Bozjan Southen Front players first need to complete the first stage of their Resistance Weapons.
The next step is to progress through the Save the Queen: Blades of Gunnhildr story.
To start this questline players will first need to take the quest called "Where Eagles Nest" from Marsak in Gangos (X:6.4 Y:5.7).
Once you progressed enough in the story you will be able to talk to Sjeros in Gangos (X:5.5 Y:5.4) to enter the instanced duty.