Scattered throughout multiplayer and campaign levels of Halo 2, Halo 3, Halo: Reach, Halo 4, and Halo 5: Guardians are UNSC containers. These include crates, or large boxes, that contain supplies for ground based Marine forces. The contents of crates can be identified by their labels, and range from portable generators to armored boots. Although their only actual use in the game is cover from enemy fire, they do reveal a bit about the UNSC military, and play a key role in the environment of maps and campaign levels. They can also serve as cover or platform.