The Eastern Adhyrianus War was a war of conquest of the Kingdom of Falglor against the fractured Kingdom of Adhyria. The war ended in a sweeping Falglorian victory, and the vassalization of Adhyria up until the modern day.
The war was caused by a number of reasons on the Falglorian side. Number one was their defeat in The Prafian War. While it wasn't a major war, only being supported by merchants and those that benefited from the use of the river, their loss was an embarrassing defeat, the primary military power in the south being defeated by a loose coalition of infighting clans who were inferior in nearly every way. Trust in the government was at an all-time low, and so both the King and Parliament decided something should be done to change this. The second reason was resources. The Ravenna Revolt and the subsequent founding of the Kingdom of Ravenna caused one of Falglor's closest allies in the Urysas, a very valuable trading partner, collapsed causing economic troubles and a lack of resources. The government needed to fix these two problems, and Adhyria looked like the solution to their problems. It was weakened significantly by the civil war, and was home to plenty of rich resources, such as gold and ivory, a valuable commodity.
The issue of how to intervene in Adhyria was discussed. The king, Edward the First, still hurting from the Prafian War, favored an invasion of the whole of Adhyria, conquering it completely, either annexing it or vassalizing it. Parliament favored intervening on Cyakti's behalf, backing him and his dynasty, placing them in the debt of Falglor, who would exploit the friendly regime. The two sides eventually came to an agreement, Falgor would invade the entirety of Adhyria, and vassalize it, getting the resources and the national pride without having to deal with a rebellious populace. With this agreement, Falglor began mobilizing their forces to their eastern border, and beginning to prepare for an invasion.
On Electi 7th, 203, an ultimatum was issued to the warring sides of Adhyria, surrender, cease resistance, and accept that Falgor owned their land, or be annihilated. Many turned down this ultimatum, either unwilling to surrender, or thinking that they could easily beat Falgor. After all, they lost the Prafian War to The Yunnaiteddo Federation just a year prior, which had undoubtedly weakened their armed forces quite a bit. If they could win a few battles against them early on, the populace would riot, and Falglor would have to pull out. Winning against Falglor would also grant their side much prestige, and would also make them the target of Order aid, in Cyakti's case, helping cement his status as the true King of Adhyria. A few states, mostly failing princes and weak barons accepted Falglor's deal, seeing no other way out, and with enemies approaching on all sides. For most factions, however, this mainly just gave them time to ready their forces and move their troops, a few signing temporary treaties or even alliances to deal with Falglor.
War was declared just a week later, with the side under Cyakti Mahatva the first target for Falgor. To completely defeat Adhyria in this war, they had to control most of the land, the cities, and either break the will of the people or convince them that Falglor wasn't that bad actually. If they were to crush Cyakti immediately, then they would be able to break the fighting spirit of other princes, and win the war more effectively. Falglorian infantry, mages, and cavalry marched into the principality, with the strategy of speed. The more mobile units would speed past the defences and soldiers of the Cyakti side, flanking around before they could react, and act as many hammer and anvils going off at the same time. The cavalry could also simply just ignore the troops and go for vital points of interest, but that was a risky strategy.
The first battles were a sort of testing ground for strategies against Adhyria, seeing how their soldiers reacted, what strategies and plans their commanders came up with, and how well they fared against them. Most feared of the Adhyrian arsenal were the Gaj, large beasts with ivory tusks that could gut a man and trample soldiers with ease. Based on intel available to them, the strategists and commanders for Falgor came up with ways to deal with them. Because of the scarcity of mages in the Adhyrian Civil War, it was theorized that they could simply throw a fireball at the Gaj and that would cause them to retreat. If it didn't then the soldiers would have to take it out the old fashioned way, with javelins, arrows, and throwing flaming pigs at them.
The battles went relatively well, the untrained peasant soldiers being no match for the professional infantry of Falglor, who were properly equipped, some even being veterans of the Prafian War. The Gaj, while certainly dangerous, were neutralized by the different methods employed by Falglor. Enemy shamans were few and far between. The ones that did appear were often unskilled and self-taught, easily overwhelmed by the Falgorian mages. The frontlines rapidly collapsed, with the fractured remnants of Cyakti's army being hounded all the way back to the capital, Rajan. The Siege of Rajan lasted about two weeks, ending with Cyakti surrendering to Falglorian forces, who occupied the town and temporarily imprisoned Cyakti until the end of the war.
While Rajan was being besieged, Falgorian troops continued on their lightning war, seeking to end the conflict before their enemies could formally rally a defense against them. They began aiming to aid pockets of Falglorian-aligned states, winning most battles they entered due to their general superiority when compared to Adhyrian troops. However, when Adhyrian commanders were allowed to pick battles and set up beforehand, they could push back the Falgorians, with difficulty. However, this was a luxury not afforded to them, as the speed of which the Falgorians advanced left little time for them to do anything, really, before they were set upon and defeated easily over and over again.
The war lasted a total of about seven months, at which point the win-to-loss ratio for the Adhyrian forces was embarrassingly bad, and ended in a decisive Falglorian victory, their main objectives (the restoration of national pride and capitulation of Adhyria) was accomplished. Falglor stuck to their plan, turning Adhyria into a Falglorian protectorate with a high level of autonomy, and putting Cyakti on the throne of Adhyria. To help keep him in check, as well as to reward loyal nobles, the different nobles and princes that had accepted the Falgorian ultimatum were placed on various high-ranking positions all across Adhyria.