Solomani Confederation: Instruments of Policy
While the Solomani Confederation Mobile Corps is a complete fabrication from me, though a bastardization from quite a number of media and literary sources, it sort of evolves/evolved from my view of a more hands-off approach from the Confederation, and an unwillingness to bluff, at least when utilizing the most visible power projectors that they have to hand.
Generally speaking, a peace time Navy uses cruisers to impose it's will in areas that it wants to or believes it has the right to influence.
The Solomani Navy is a tad short in that department.
The Solomani Navy is expected to do everything military or paramilitary that is space related, which would indicate the Federation StarFleet, if StarFleet was being prepared for a war against the Klingons and/or Romulans, and only building battleships, not Constitution class cruisers, if not on a constant war footing, one reason to mass your ships into strike forces, ready to go.
The Solomani Army is trained to fight win against the ground force of the Imperium, and retake lost planets, so outside of specialized light infantry forces, it consists of primarily heavy armoured units, not really suited for a counter insurgency campaign, prolonged or not.
In fact, the Solomani Confederation is well aware that permitting it's two most visible instruments to engage in such actions wastes their time, accrues bad publicity, blunts their edge, and forces them to divert energy and resources that should be used to deter external threats, when not handing them their asses.
The Solomani do not commit their forces piecemeal, at least not when the issue is considered worthwhile to deploy capital ships. If it isn't, but the matter is important enough for a military demonstration, a deep strike cruiser with a reinforced Confederation Marine Commando company suddenly appears overhead to make some form of decapitation strike. All very visible and above board.
There might have been some reconnaissance elements inserted covertly beforehand, and local SolSec assets used to report on the tactical situation and possibly contribute to the success of the mission with selective sabotage of planetary defence installations.
But publicity shy Black Ops tend to be solely the province of SolSec, since the Navy doesn't disown it's personnel.
A warning signal would be when a complete FleetRon diverts and makes an unscheduled port call in a system. The point of no return is when it includes a transport fleet carrying an expensively mobilized Panzer Army.