Gabriele wrote:something highly mobile and very light? Do what everyone has already done: couple some 120mm mortars to lightweight 155mm howitzers.
All for it, but "couple" is the wrong expression (for reasons that mr. fred suggests). Yes, there sould be some of both at the BG level, at least.
An 81mm mortar has survived because it (and sufficient rounds for it) are still mobile with infantry; 120 mm is practically artillery
- also, consider that for suppressing fires (a mortar isn't, or at least used not to be, exactly a precision weapon) the splinter effect of a ton of 81 mm rounds is four times as many as from a ton of 120 mm rounds - even leaving the logs constraints aside, as suppression needs as many rounds as possible for the duration of X
... still awaiting the answer on the arty side of things: how many times more rounds of 105 vs 155 mm to a ton?
Ever-lasting truths: Multi-year budgets/ planning by necessity have to address the painful questions; more often than not the Either-Or prevails over Both-And.
If everyone is thinking the same, then someone is not thinking (attributed to Patton)