Smoke grenade

Smoke-producing flares are used for a variety and diversity of reasons by the UNSC. Different reasons appear to have different colors of smoke attached to them. There are a variety of smoke-producing items, few of which have been observed being in use by the UNSC.


 * Signal flare: used to alert allies of a friendly position. They utilize thick, green or white smoke.


 * Smoke canister: These are used to signal for pickup after a mission, or a request for an equipment drop, or even a need for emergency evacuation. They create thick, blue or red smoke. These are also referred to as "smoke grenades."

Production notes
Smoke canisters were used in Halo Infinite's announcement trailer at E3 2018.

List of appearances

 * Halo 3
 * Halo Wars
 * Halo 3: ODST
 * Halo: Reach