Well since everyone is detailing their capabilities, I think I should do so too
On the ground:
The Septonian military currently lacks any sort of armor ( Tanks, LAVs, etc…) but my infantry are heavily armed and extensively trained. When not fighting wars the military constantly trains, pitting battalion vs battalion in full scale training scenarios. Pretty much one division will invade the world of another division where they fight mock battles lasting anywhere from a day to a couple weeks. The benefit being, any dirty trick you might see out there some Aradite commander will probably do to you in training. They try to make training as realistic as possible even down to used sim-rounds that have the same ballistic properties as the actual rounds they fire and using riot control force shells to simulate explosives ( Pretty much just throws bodies around and makes a loud bang). The down side is that injuries are common in training but that benefits training for the corpsmen and medic’s. Lacking armor ( as it tanks etc) means I rely on my infantry heavily, which means I need to find other ways to launch offensives and hold ground. Stealth, Ambush tactics and fast offensives is the only way we can fight, usually using a combination of the three to tip the scales in our favor. A Septonian raid will usually happen in the dead of night or early in the morning. It will start as utter silence and then in an instant explode into terrifying hail of fire before we flood the area with air assault troops. Everything that moves and isn’t Aradite gets killed or at least shot at until it can be killed. City raids work on the same principle but last significantly longer based on the size of the city. I also rely heavily on air support from fighter bombers, fighters and gunships, we are adept at maneuver warfare. My infantry carries heavy and light rocket launchers for tanks and vehicles and SAMs for air forces. Of course the weaknesses here are if we get caught out in the open then we are pretty fucked, infantry no matter how armored or trained they are can be killed pretty easily in a shooting gallery. My special operations forces are extremely well trained as well, even more so then my regular line troops. They are trained for every possible contingency that the brass can think of, crazy things life in vacuum ship raids or long range asteroid field recon. Don’t be surprised if you see a 5 man team of Special forces jumps from asteroid to asteroid to get eyes on a ship or space station. They jump, dive and operate in the vacuum and are usually pulled from the best soldiers in marine and army battalions.
Weakness: There aren’t a lot of us, we live long and don’t reproduce much and it takes 18-20 years to train one soldier. Our training process is also dangerous, new graduates from military academies are thrown into combating feral beasts and beings on other worlds as a final training exercise. Everyone that survives is placed into an operational battalion and those who don’t before ever seeing the actual military.
In space: This is a big weakness for us, mainly because we have never faced another force in space. So we don’t know what to expect by ways of weapons. Most of my naval ships are outfitted for multi role combat and aren’t devoted just to space warfare. We have cannons for ship borne artillery and missiles for orbit to ground strikes, both can be used in space as well but there are not devoted to it. The only space devoted weapon we have is our Magnetically accelerated torpedo which is pretty much a torpedo accelerated to railgun speeds. Our navy is mainly used as an deployment platform and a support by fire tool, any devoted naval combat requires higher numbers or specialized tactics which are still under development. The exception here is my Blackhole class ship, which plays into the strengths of my current combat doctrine. The stealth systems on the Blackhole class are excellent, masking radar, thermal and EM signatures from outside sources. It can stalk what ever it wants and not be seen outside of a visual identification. The sensor package it carries is also extremely powerful, able to discern a wide spectrum of signatures and identify them, such as weapons discharges, FTL jumps and intercept radio transmissions.
Diplomatically : We love peace as much as the next guy and can be reasoned with, unless provoked or threatened. There isnt alot of us in one place at one time and we are EXTREMELY careful. If we smell the slightest hint of something going on or see something questionable we will react appropriately. Im not saying if you flinch we will start shooting up the place but if you start reaching for weapons or point weapons at my guys we will start taking action to raise our survivability chance. We are by nature a friendly people and very helpful but we are easy to spin up when people start calling for war, we are just nationalistic.