Halo Infinite’s first Operation, Combined Arms, is a significant addition to the game. Launched on November 14, 2023, and running until December 19, 2023, Combined Arms brings a host of new customization rewards and gameplay experiences to players.

The Combined Arms Operation introduces a free 20-tier Operation Pass, which offers new customization rewards. These rewards include new armor and vehicle coatings, emblems, and visors. The iconic Mjolnir Mark V armor from Halo: Combat Evolved and a playlist of beloved classic maps from Halo 3 have also been added to Halo Infinite as part of this operation.