Game Version number: 1.3.0.18
Modded: No
Human player needs to be Captain to use explosive rounds.
Human player can recruit and command AIs as Private.
AIs can shoot explosive rounds with mortars.
So a human player in the rank of Private can shoot explosive mortar rounds.
This leads to mortar barrages and destroying everything within 2900 m radius.
Commanding AIs to use mortars with explosive rounds should be available only for Majors.
Commanding AIs to use other mortar rounds should be the same rank-wise as with human players when they use those rounds.