1. Mortar can be used to provide fire support for REALLY REALLY
close ranges. P
2. It is easier to request for support that is a coy or bn asset,
than to get support that is from a division asset. Not every sect
comd or PC that requests for 155mm fire support will get it. But,
requesting for mortar fire is easier since its a lower level
asset.
3. Partly linked with 2. Mortar has a faster firing rate. In a way,
they react faster, and can drop some serious HE sh!te at closer
ranges. On the offensive, u can use mortar to keep certain strong
points pinned down or ducking for cover. Or even cut off the
enemy's escape route for really decisive engagements, while the
tuber artillery can pound the objective itself.
4. Mortar on soft skinned targets is more effective and cost
efficient. Tube Arty on mechanised, armored targets.