Population: ~8000 in ports. ~1000 in numerous airships
Race: Khajiits, some other races but not as numerous.
Khajiits were always wary, always watching for the oddest of events. They lived in peace in their land, with their moon sugar at the side. They respected outsiders, while they saw nothing but trouble from Khajiits. A stereotype that ran deep in the outside lands. True, there were those few that lived up to this idea but there were also a great many that didn't. It was those that complained, and it was those that somehow removed that stereotype from the world. That was until the Mane died, and a great deal of grief struck through the land, and a week's later. The end war fell upon Tamriel.
The battles were long, hard and dangerous. Those that choose to fight, never seemed to return. Nobody knows how it ended, but the world was left in anarchy. The Khajiits were without their moon sugar, without their mane, and without farms or food. So a group of them started to banditry. Raiders of the Moon formed, just after the End war. They stole food, weapons, clothes and anything they wanted. It was the Strongest that prevailed at this time. They continued, until they drove out nearly all the refugees, and all the survivors but themselves. They had everything to themselves, and they had a stockpile to last them.
So with nobody to raid, they lead a new path. They fought with themselves, it was long and hard but they gave up their bandit life. Elsweyr wasn't a place for them anymore. So they gathered their knowledge, and supplies to journey to Black marsh.
On the way there, they found a odd metal ship in the sand. Forgotten from the ages, they decided to explore it, and they decided to excavate it.
They learned from the airship, the old dwelmer tech. They managed to fix it up, and then they proceeded on to Black marsh.
The Raiders of the Moon, erected a small city near the ruins of Rockguard. It was among the tall swamp trees, a city supported by the roots of the trees. They built ports, huge towers of wood. They had homes on platforms, they transported soil and built a water reserve. They added rain collectors, and grew their crops on these cities.
When the first four airships were completed, they decided to explore the lands, they took supplies, paper, and building materials and wanted to charter the land. Which they did, always from a bird's eye view.
They then constructed similar ports across the land, One port in the Dragontail moutains. One port near the island of Stirk. one far out in the isles by Morrowind. Separated so they could easily form trading routes in the near future.
Time passed on, supplies grew, and thus The Khajiits decide to try and communicate with other various kingdoms of the lands.
Diplomancy
The Raiders of the Moon has had little contact with the outside world, but for good reasons. They wished to develop their towns and cities before fully immersing themselves in the throes of diplomancy. Now is, however the time that they wish to open up to foreign kingdoms, and become traders of Tamriel.
Government
Lead by a council of four Khajiits, who foresee all of the duties in each of the port cities. They make all the most important decisions, but mostly leave the traders to govern themselves, unless Council support is needed. There are laws, and most do live by them. A person's property, is completely theirs. Nobody directly owns the city, and each part is there's to do with what they wish with. However, if it puts the city at risk then action will be taken. Slavery is a absolute crime, if slaves enter Khajiit lands. Then under their code, they are a citizen of that port until they leave. A free citizen, who are able to do as they wish.
Lands
All cities are nearly of equal size, and usually build upon trees or mountains. They have a port used for docking of airships, and only Aeruis (largest city) has a hanger which they build the airships. They hope to build more by their island ports, so it is easier to construct and do tests for their stability and how water resistant they are.
Aerius - Main city in Black Marsh, near the ruins of Rockguard.
It is their biggest city, however it only maintains a population of 4000
Cautes - Port in the dragontail mountains, has a population of about 1500
Siuerra - build on the old island of stirk, reliable and isolated. It provides space for storage and outposts. Has a population of 1500
Malliem - Build on a island off the coast of morrowind, it has a fertile land for growing of crops. Has a population of 1000
Populace also can live in their airships, only needing to dock for food, water, and fuel. There are currently many doing this. Some are privateers.
Military
Besides of their bandit past, the Raiders of the moon have very little in this department.
Only a few dedicated to protecting their cities from outside threats and don't have a real offensive military power.
Mostly everybody knows how to defend themselves, and if needed at all can form a stable militia however this would stop their trading, their food supplies and everything they would need to survive. This would only be implemented in emergency situations.
Culture, Demographics and misc.
While there are other demographics in the Raiders of the moon's various ports, it is mostly comprised of Khajiit's and they make up a very small percentage of the population.
Trading is the most common profession, followed by farmers.
The Khajiits however do enjoy time off to listen to music, view arts and relics of the old world. There are also a number of privately owned airships which can be set out to voyage the skies, which provides a great view in the night.
Everybody is completely free to do as they please, as long as it's in the port's best interests and harm doesn't come to the occupants. Usually, warning come before it happens but the punishment for going through is complete exile. The accused is left a place of their choosing, but can never return to any port. Their family is also disgraced, but there are ways to earn their honour back.
The Khajiits also anxiously await for the return of their mane, as it is told in various books of their past. But so far, no Khajiit has been born under a third moon.
Religion
The Khajiits still honour their old world gods, and most notably the Bandit god, Baan Dar. They worship him for giving them this future, and without their bandit history. This port, and their air-nation wouldn't be possible.
They still also believe in the moon phases, and what they are born under. But without a mane, this is slowly dying as a tradition yet there is still the phsyical proof of the moons, as there are a number of different Khaijiits in different standings. They each play a vital role in the community. From trader, privateer, or farmer.
Factions
Council of four - The four Khajiit leaders, each of them govern their own port. Size of the port, or population of the port doesn't give them different ruling powers, each of them rule equally. They also don't 'own' their ports. Merely watch over them, and guide them.
Solace - Privateer group founded by Ra'kira Goladipaw, a Cathay, but don't call him by his last name. They are hired by some airships to protect their wares and good, or they are hired for taking out a rival trader. They also do other sorts of missions and requests, just pay them the gold.
Traders guild - group of traders that share their wealth with each other, secretly deal in a black market with a means to get whatever you want.
Blackfoot pirates - A ill fitted crew of pirates, with a barely functioning system of command which only stand with force. Not much of a threat, they target exiles.
Molavi clan - Clan of the best guard. Recruits who go to this forgo their birth name and upon completion pick a new name, and their clan name. The original founder fell in combat, and is highly honoured.
Three moons fold - Religious clan dedicated to finding the new mane, however there have been no alignments of the moons and thus there has not been a third moon.
Builders guild - A clan of highly skilled builders, entirely comprised of Dagi-raht's or Dagi and are known for their skills of climbing and thus are suited for environments they build in.
(prone to changes)
Major Figures
All council members are Suthay-raht, except for Ri'grull. He is a Cathay-raht
Ri'grull Kain - one of the council members, leading the council of Aerius.
Ri'ulisa Feakard - one of the council members, leading the council of Cautes
Ri'helam Magalm - One of the council members, leading the council of Siuerra
Ri'kale - One of the Council members, leading the council of Malliem.
Ra'kira Goladipaw - Leader of Solace, A tough Cathay.
Erius Melgurrie - Main leader and foming member of the Traders guild.
Skizze - Leader of the blackfoot pirates, very small crew. Less than one airship that barely works.
Unrduis Molavi - Ri'grull's personal guard, Cathay.
Unbrus Molavi - Ri'ulisa's personal guard, Pahmar.
Ri'shor Molavi - Ri'helam's personal guard, Cathay.
Ri'asli Molavi - Ri'kale's personal guard, Suthay.
(prone to changes, and additions)
Here's my non-evil KC. Please understand that the ports are tiny compared to kingdoms or things. They build high towers, ports and cities which exist on multiple levels of trees.