A Smoke Grenade is a simple metallic canister designed to emit a thick, persistent smoke cloud in order to shroud an opponent's vision. Related to, but not as effective as Blind Grenades, Smoke Grenades are used by the military forces of the Imperium of Man as a tool to take tactical control over the battlefield.
However, there exist many technologies among the various intelligent species of the galaxy that are more than capable of penetrating the simple visual obfuscation caused by smoke. This can make these grenades ineffective in this role against certain well-equipped foes.
- Warhammer 40,000: Battle Manual (1st Edition), pg. 86