CASPER SCHWARTZ'S (Abridged) GUIDE TO THE VYTAL PEACE ACCORD 1
The Vytal Peace Accord, also known as the Vytal Treaty, was put together by the Kingdom of Vale, Kingdom of Vacuo, Empire of Mistral and Kingdom of Mantle at the conclusion of the Great War (or the 'Uniformity Experiment', to those in Atlas). It's stated goal was to ensure peace worldwide, and to ensure that a war like the Great War never happened again.
It outlawed slavery, although 'indentured servitude' is still prevalent in some prefectures of Mistral. It should be noted that only Mantle and Mistral actually practiced slavery at the time of the Great War.
Monarchy was abolished worldwide. It was actually this part of the Peace Accord that would lead to a falling out between Vale and Vacuo, as the Queen of Vacuo (Audumla), Vale's primary ally in the conflict, was wholly against giving up her crown and enduring the same 'punishment' as their shared enemies. Mistral teaches it a little differently, mainly that the Queen, being a Faunus, was power hungry and unwilling to accept the peace. In any event, Queen Audumla eventually 'saw reason', and would serve as the first Chieftain of Menagerie.
It abolished laws that were specifically targeted against Faunus. It 'established' equal rights between Humanity and Faunuskind, although anyone with eyes, ears or a sense of recognition can tell that that is a load of bollocks.
Speaking of, it established the Chiefdom of Menagerie. It would have been a Kingdom in and of itself, were it not for Mantle's refusal to sign it if that was the case.
When the Kingdom of Atlas was established, it (at least for its first few months), tried to avoid signing the VPA, stating that, as they had no part in the 'Uniformity Experiment', there was no need to sign. It was the threat of total cessation of trade to and from Atlas by every other nation that forced them to sign. Some Atlesian Politicians have tried to exit the treaty over the years, and it is still a fairly popular movement in the upper classes.
The Huntsmen Academies were established after the Great War, and King Oswald of Vale became the first Headmaster of Beacon. The other academies of Haven, Shade and Alsius were placed in the hands of Oswald's most trusted followers.
It also began the current naming conventions across Remnant, even if it took about a generation to actually get going.