This may help, Demescia.
We'll start with the Nebulan invasion of Syrixia. This was how Nebula came onto the international scale. Socialist partisans in Syrixia began to riot as they wanted the separation of Parliament from a unified assembly into an assembly of political parties. Eventually these socialists hatched a deal with Nebula, an expansionist (and socialist) nation in the northeast of TNP, to launch a joint attack agianst Syrixia and create a socialist Nebulan puppet state there. Eventually Syrixia agreed to split Parliament into political parties and the socialists subsequently signed a treaty with the Syrixian government, turning on Nebula. Nebula and Syrixia, from that day forth, were sworn enemies.
However, the conflict did not stop there. It reignited in Rhuvanland, a small nation near Trinster. Rhuvanland was under incompetent leadership which put the country in economic Hell. Syrixia offered to give it economic assistance in exchange for it becoming a protectorate. Rhuvanland accepted however groups of conservatives in the western parts of the country did not, and the country was split into the Free Republic of West Rhuvanland and the Protectorate of East Rhuvanland. While East Rhuvanland prospered, West Rhuvanland was mired in a war as Nebula, always looking to expand, tried to install a socialist puppet state there. Eventually East Rhuvanland and Syrixia, as well as West Rhuvish forces, helped to repel the Nebulans, and the Nebulans then focused on another area; the small, governmentless strip of land Nebula dubbed "Galacta".
Some Galactans, however, were not content, and after Galacta was fully integrated and annexed into Nebulan territory, these people founded the Galactan Liberation Front and began to rebel for the cause of creating an independent Galactan state. The Nebulan government declared the GLF a terrorist group. Meanwhile, in Rhuvanland, the East had finally reached its economic quota for reunification, and with the promise of helping the West continue its recovery by the East in mind, Rhuvanland was reunified after a conference between Syrixia and Kannex, the latter of whom helped West Rhuvanland, though did not make it a protectorate as Syrixia did the East, which also received more economic aid due to their protectorate status. The newly unified Federal Republic of Rhuvanland condemned Nebula for its repeated fits of expansionism and imperialism, and began financing the GLF.
In response, the Nebulans condemned Rhuvanland for funding what they called a terrorist group, and threw up a blockade on Rhuvanland's coasts. During this time, there was a brief period of peace in Rhuvanland as all eyes were once again on Syrixia. The leader of the Church of Syrixia had been murdered and there was also a failed attempt on the life of the Prime Minister, Alfred Nursson. This was done by an extremist organization called the Order of the Loyal, that refused to accept the united Rhuvanland and wanted total separation of the conservatives from the liberals, which included a lack of relations. Eventually, troops from Syrixia and its ally Ceretis infiltrated the Order's HQ and disbanded it, but not before the Order kidnapped and killed the Cronaal Minister of Foreign Affairs, Eden Hall.
To make matters worse, Rhuvanland eventually issued an ultimatum saying that they would mobilize if the blockade was not removed and Nebula worked towards peace. Nebula did not want to work towards peace and did not remove the blockade, and after the murdering by blockade ships of the crew of an innocent Rhuvish trading boat that did not care for the blockade, Rhuvanland mobilized. Nebula, soon after, declared war. As Rhuvanland was a member of the Helmebaine Alliance, fellow members Trinster and Kannex declared war. Syrixia also entered the war, but indirectly, only supplying arms and vehicles among other things, as it was the occupier of NPTO's Deputy Chair, and did not want to set the image of a warring nation in a peace organization.
Meanwhile, in Cronaal, uprisings killed many as people were discontent with the murder of Eden Hall by the Order in Syrixian territory, and that Syrixia should have responded quicker. Syrixia apologized and eventually passed an act upping the ante on Syrixian security, but it wasn't enough. While the Cronaal government first sided with Syrixia, it eventually turned on Syrixia, albeit indirectly. The Queen of Cronaal, Diana II, grew insane and even tortured the Syrixian ambassador to Cronaal. She then declared war on both Nebula and Rhuvanland, and sent a fleet to Rhuvanland to wreak havoc and kill, with no other aims than that.
Kannexan and Rhuvish forces forced the Nebulans out of Rhuvanland and they moved to the Kannexan protectorate of Pelhafor, which was already mired in civil unrest and was on the brink of revolution. However by the time Cronaal's forces arrived at Rhuvanland they were surrounded and Nebulan forces were no longer present, as mentioned before. As Diana II grew more and more insane, Wolfish/Syrixian/Nebulan/Rhuvish forces pushed into Cronaal's interior. Syrixia had the Cronaal capital, Smithworks, surrounded, so Diana went kamikaze and detonated a nuclear warhead in a bunker under the city. Nothing and no one survived except the Syrixian soldiers outside the city and a few citizens.
After the tragedy peace was immediately declared, and Cronaal was temporarily split into occupation zones. Other than that, it was a white peace. However, tension between Nebula and Syrixia is rising...