Battle-Forged

Battle-Forged is a triumph: complete 3 Battlegrounds in Fireteam Ops. Reward: 20 Legendary Marks. It sits in the Teamwork: Strikes and Battlegrounds section of the Monument of Triumph list and is not listed under a seal.

How to complete

1. Open the Director and choose Fireteam Ops, then pick a Battleground (three-player activities scored by enemy kills). Matchmaking is available at Expert difficulty and above; Normal can be run with your own fireteam.
2. Complete any 3 Battlegrounds. The current rotation includes Heist Battleground: Mars, Behemoth, Echo: Core, Heist Battleground: Moon and Defiant Battleground: EDZ.

Tips

Lower difficulty is fine for the triumph, since only completion counts.