Rallying War Banner
Drops from Supplies from the 7th Legion. it's super boring. You place a mini flag on the ground that lasts for 5 secs, then people near it yell "for the horde/alliance" once
Rallying War Banner is a toy obtained from 
7th Legion Supplies bags awarded at Exalted reputation with the 7th Legion.
Guide awaiting review
Reach Exalted with 7th Legion
Complete quests and activities in Battle for Azeroth to build reputation with the 7th Legion until you reach Exalted status.
Earn Paragon Rewards
After reaching Exalted, continue earning 10,000 reputation with the 7th Legion to receive a paragon cache bag.
Open 7th Legion Supplies
Open the 7th Legion Supplies bag from your paragon reward to obtain Rallying War Banner.
Use the Toy
Once obtained, the toy can be used by any character on your account. Using it places a faction-specific flag on the ground that lasts 5 seconds and causes nearby players to shout faction-appropriate battle cries, with a 10-minute cooldown between uses.
