Anyways, I'll just post again, now that I have time...
last post: http://tvtropes.org/pmwiki/posts.php?discussion=13246473300A75160100&page=72#1777
I'll just skip a few pointless possible rants and...
The Griffon war ends with the Griffon governments driven from the Equestrian valleys, the Pegasi unified and in control of the previously Griffonic city of Marelin (Griffon name of Coopenhagen), with general-princes carving out new kingdoms in the North and settling down in the Griffon cities (driving the Griffons out, and confiscating their property). In Imperial politics, the war is important in that the Heimdaller family is stripped of all previous power and sent into exile, while the remaining Fringe States and Alfheim joined together in a semi-religious war to push back the Equestrian hordes. For pony politics, it was revolutionary, as suddenly the strain of decades of total war was finally relaxed, and two new kingdoms were added to the existing alliance/confederation of the Red Council. The growing centralization relaxed, as lords reigned like kings in their lands, and an abundance of resources meant a reduction in interpony conflicts. There was one problem for the victorious herds, though: the existing griffon citizens, left landless and starving to wander the countryside.
These Griffons flooded towards the mountainous Fringe, but a number of them failed to do so, or refused to do so, and instead formed independent tribes within Equestria. These tribes constantly clashed with the settling ponies, and the local governments often applied brutal force to hunt them down, sometimes establishing anti-meat-eating laws to give it a touch of legitimacy. As the returning warrior-priests continued to stream in and brutalize the Griffons, the tribes responded with their own force, often taking back deserted forts or castles and waging a guerrilla war on the colonists, hoping to inspire the Fringe states to invade Equestria and return their cities to them. The unicorns responded viciously, killing any Griffon on-sight and assaulting the remaining strongholds. This continued on in a sort of "Flower Wars"; princes looking to collect sacrifices for blood magic (note again: this sort of magic is not inherently evil, simply more powerful and more easily abused) would send their forces into psuedo-religious wars with the intent to capture instead of kill, while claiming glory from the primitive church establishment and seeking reward from the Red Council.
Now, racial cleansing and the harvesting of sapient beings seems a little harsh when compared to modern day Equestria, but it makes sense given the time period. The overall Equestrian culture was in a very anti-Griffon mood, and desensitized by the war. On top of that, they were in a state of religious extremism- while religion naturally plays a huge part in a theocracy, it was especially potent thanks to the combined efforts of the very religious Red Council, the recently-ended holy war, and national efforts to suppress secularists who sought to remove their property ties from the religious establishment (to tie the land to family lines and laws, securing it) during the war- securalism was seen as a threat to unicorn legitimacy, even in such a mild form as property right matters. These religious causes had whipped up much of the populace, and solidified the status as a theocracy. Beyond that, one could just say it was a time of few laws and regulations, where a few opportunists saw a chance to violently exploit a situation.
Back to the situation:
The Flower Wars were not entirely one-sided- the tribes managed to hold out for quite a while, and organized together into a cohesive and disciplined fighting force. Nonetheless, their lack of numbers or resources meant it was an inevitable defeat, a fact eventually recognized by the remaining Imperial Griffons. After several attempted counterinvasions, things began to turn from bad to worse, after an Equestrian engineer invented the weapon known as the crossbow- a weapon far more easily used by ponies than ordinary bows, and far more powerful. This meant a rise in military weaponsmiths and producers, and also the end of the Griffon superiority in ranged combat. And, more importantly, a growing demand for powerful construction spells meant that more nobles wanted to participate in the harvest, growing increasingly efficient. The tribes, desperate, went to the Imperials, explaining that, if they did not strike now, they would lose an important asset. The Fringe Cities, motivated by a growing fear of possible future conquest by the hordes at the gates, rallied behind the message, and the joint invasion by the Griffon factions subsequently took place many years earlier than it was supposed to.
The Griffon invasion, although immature, was still well-planned and well-executed. Smashing through the unprepared Equestrian forces, the armies soon had the fledgling colonies of Flankfurt and Stalliongrad under siege, and had sent the Northern defense forces reeling. It took the Southern united forces, as well as expeditionary forces set aside for the exploration and possible conquest of the newly discovered White Isles (home of the zebras). Along with that was a major advancement in magical warfare that would change the nature of aerial-verus-land combat: the creation of spells that would, instead of sucking the entire area of airspace downwards to bring down large formations in a massive waste of energy and resources, allow individual unicorns to saturate large areas of specific airspace with various magical impediments that would disable flight. By increasing efficiency and accuracy, the army was finally able to cope with smaller-unit tactics and more dispersed armies, making anti-air combat viable at last on a larger scale. With all the combined efforts of Equestria's military, the last major Griffon offensive in Equestria was over, and the tribes subdued.
The Griffon Tribes eventually were eventually moved onto the lands of those who sought to harvest them (moving armies across neutral patches led to fights over property rights and military access), and forced to accept peace by offering up the weakest or least valuable for an offering whenever the unicorns demanded tribute. In return, they were left in peace, given cattle, with some lords even going out of their way to build more accomodating living spaces, as if to start competition. These camps were seen as dangerous, but entirely legal, and while some saw it as morally objectionable, most ponies were either directly profiting or apathetic.
This ushered in a period of tense peace, as each nation withdrew into domestic matters, while silently preparing for future conflict. Most pressing was the growing threat of the unified Pegasi, who were increasingly militaristic and demanding, as well as the Diamond Dogs in the Eastern barrens and plains, which had settled down in their own civilization and were still viewed as a lower form of life by the Equestrians. The main thing that happened at this time was that the Red Council clamped down on the lesser kings, transforming from an alliance into a confederation, and eventually into an oligarchy, with a number of important nobles representing each region of Equestria acting on a ruling council.
Anyways, this looks like a nice place to stop