Solomani Army: Interstellar Transportation
I've always liked military gliders, though their heyday was over within a very short span of time. Cheap, one-shot transports that can carry equipped troops and some moderately heavy weapons, into the heart of the enemy's territory, though perhaps, not too far from getting reinforced by the ground troops, a bridge that might be too far to cross.
Of course, that doesn't really work anymore since the Great Patriotic War, since air defences have become more effective, and helicopters can be used to land troops when and where it's convenient or necessary.
Though that's evolved a little as well, since what you want is a long ranged fast stealthy transport that can drop the troops on a pin and surprise your hosts. Basically, the tilt-rotor Osprey, or at least, it's successor.
The equivalent might be a large air/raft, and that seems to scream, sitting duck.
The Solomani Marines would seem to be the ideal instrument for commando raids, but in most cases, the Solomani Confederation prefers to be visible and heavy handed, which is where the Army comes in; outside of which, the Army is keen to demonstrate it's worth and justify it's budget allocation.
Since the Army isn't supposed to get anywhere without the Navy, the Navy has to provide it's various transports, almost all of which happen to be two thousand tonnes and below.
To reiterate, standard Solomani hulls are two thousand tonnes, a thousand, six hundred, four hundred, two hundred, fifty nine, forty, thirty, fourteen, and ten.
Both the Army and the Navy are very fond of the two thousand tonne assault ships; the Army gets to deliver a big force, whereas the Navy can operate them with a minimal crew.
Most of them are engineered to be heavily protected and fast, to bring it's payload, the troops and their equipment, as soon as possible to the surface, so that aerospace defences have only a very limited time to target them. Even heavily armoured grav tanks, since ship armour factor fourteen and re-entry speed six or seven is going to keep them better protected and faster than if they descended on their own.
For really fast re-entry, the Navy provides the fifty-nine tonne shuttle, that depending on your view of human frailty, could accelerate anywhere from ten to thirteen point five gees.