A Walking Tank is given a combat test; attempting to combine the durability of a tank with the agility of an infantryman.
Despite their high performance, Armed Porte suffer from short operational times, so tanks and other vehicles remain as mainstay battle unit. One notable Armed Porte is the Troperion Beta, an Ace Custom refitted with improved sensors and fire-control systems. Armed Porte in general are more about instilling fear in the enemy, taking advantage of their theatricality.
Armed Porte mecha are nothing more than tanks with a mildly humanoid structure.
The artificial muscle, frame, neuro-link control system, and Applied Phlebotinum Drive were derived from alien technology, and Armed Porte pilots are aided by a complex AI that can learn, adapt, and even make conversation to a degree. Nonetheless, Armed Portes are used and destroyed by both The Federation and The Empire in great numbers.
Armed Portes are dangerous weapons, and the protagonists happen to pilot them, but they're only one part of the military and serve alongside traditional weapons.
At an early state of development, Armed Portes were experimental machines for artificial muscles, frame, and neuro-link control system that require a humanoid form to be fully realized. It take decades of development from there before the first combat-worthy Armed Porte can be built.
La Résistance is lacking in real armor support, so they improvise them from load-lifting machines used in construction, where the precision and lifting capacity of the Porte are vital.
Armed Porte don't have any advantage over prior/existing war vehicles. The Empire simply uses them for their psychological effect before razing the target with its main force.
Once Troperion Alpha unlocks the Applied Phlebotinum Drive's limiter, it gain the ability to distort time and space (for example).
Double Subverted: Not wanting to waste any potential force multiplication, La Résistance applies some modifications to a captured Armed Porte. It turns out to be fearsome, powerful machine.
Parodied: The latest model Armed Porte comes with a stereo system and a turret ripped straight off a tank as an absolutely impractical hand-carried weapon. It also tends to fall over a lot.
Zig Zagged: The Empire deployed the shiny new "Armed Porte" and claimed it to be an innovative machine that would change warfare forever, but that turned out to be little more than propaganda or even an outright lie. La Résistance managed to capture some of these units and converted them into construction machines. These "Armed Porte (Con)" turned out to work pretty well in that field - so well that they became widespread. Eventually, The Kingdom improved the Armed Porte and turned it into a truly awesome combat unit.
Despite writing a realistic miltary series, for Rule of Cool or some other reason the writer wants to put mecha in it, but makes them as realistic as possible to keep with the general tone of the series.
Invoked: The Empire recognized that their war machines have a limit on where they're effective, but something more humanlike could fight in many more enviroments where tanks and planes wouldn't be as effective, so they begin blueprints for the Armed Porte.
The main character is an extreme Combat Pragmatist who is presented with a cool Humongous Mecha to use in battle, but explicitly refuses to use it because he knows that the humanoid shape is just for Rule of Cool, and that nothing beats a good old-fashioned artillery strike or well-placed gunshot.
"No, sir, I will not authorize funding for this. This is a military unit, not an Asian cartoon. Come back to me when you've got something that can take hull-down stance behind something that doesn't happen to be a skyscraper. And by the way, where did you expect me to get the parts for these leg workings? Can you say 'logistics?' Lo-giss-ticks. It means 'military supplies' and the good old Wheel-and-Axle is super easy to stamp out by the hundreds of thousands. Leg workings... *scoffs* the very idea..."
Discussed: "Sure, the cost of an Armed Porte is equal to three M-2000 battle tanks. But as you see, three tanks stand no chance against a mech."
Conversed: "Huh? That mech throwing grenade? Are they even aware how hard it is to program such pattern data for Armed Porte?"
Deconstructed: The Armed Porte prove to be a waste of money to construct because they're so impractical in combat, being top-heavy, slow, and a large target.
Eventually, these flaws are smoothed out, and the Armed Porte dominates the battlefield.
The Armed Porte is retooled as a specialist unit, deployed in urban areas where tanks are too vulnerable.