Final answer:
A free-fire area is a zone where any weapon system may engage targets without further coordination. Indirect-fire weapons like artillery are commonly used, but direct-fire systems and air-delivered munitions can also be used under certain conditions.
Step-by-step explanation:
A Free Fire Area (FFA) is a specific designated area into which any weapon system can fire without additional coordination with the establishing headquarters. FFAs are commonly established in combat zones where the likelihood of encountering friendly forces is low and the area is deemed to have high enemy presence or activity.
Indirect fire weapons, such as artillery or mortars, are typically used to deliver fire into these areas due to their range and capability to cover large areas. However, air-delivered munitions from aircraft or other direct-fire systems like tanks may also be employed within an FFA if they have been cleared to do so and the rules of engagement permit it.