Final answer:
To minimize collateral damage and reduce the number of rounds needed to defeat targets with a 120mm mortar, precision-guided munitions such as GPS-guided or laser-guided shells would be used.
Step-by-step explanation:
The munition that is available to utilize with the 120mm mortar to minimize collateral damage and reduce the number of rounds required to defeat targets is likely to be a precision-guided munition (PGM). Precision-guided munitions, such as GPS-guided or laser-guided shells, can significantly increase the accuracy of artillery, thus requiring fewer rounds to neutralize a target and reducing unintended damage to nearby structures or non-combatants.
Modern military rifle mechanisms demonstrate a similar principle of precision and damage reduction, where internal parts recoil over a larger distance to minimize the average force exerted on the user, enhancing the weapon's accuracy and shooter comfort. A similar approach in artillery could involve the application of technology for enhanced precision.