What is the main purpose of smoke rounds fired from 81mm mortars?

• A. To illuminate targets for better aiming
• B. To obscure visibility on the battlefield
• C. To increase the range of fire
• D. To create a diversionary tactic

Answer: (B)

The main purpose of smoke rounds fired from 81mm mortars is to obscure visibility on the battlefield. When smoke rounds are deployed, they create a dense screen of smoke that can hide troop movements, protect forces from enemy observation, and limit the enemy's ability to aim accurately at friendly units. This obscuration is crucial in combat situations, as it allows forces to maneuver without being seen, provides cover for tactical movements, and can protect critical assets from being targeted.

In contrast, illumination rounds serve the purpose of lighting up an area to improve visibility for both targeting and situational awareness, which explains why that option is not correct in this context. The notion of increasing the range of fire primarily relates to the capability of the mortar and is not relevant to the specific function of smoke rounds. Lastly, while creating a diversion can be part of a larger tactical plan, it is not the primary function of smoke rounds, which is specifically to obscure visibility rather than to mislead or distract.