(Spoiler alert) Based just after Volume 3 and during Volumes 4 and 5 of RWBY about an (OC team) 1st Year team that studied at Beacon Academy and dealing with their own fallout from the Fall of Beacon and their team breaking apart.
A short period between Volume 5 and 6 of RWBY focused primarily on Blake and Yang and Blake's promise. This is my own made up version of how things transpired before Volume 6 and Blake's promise which was only mentioned in Volume 6 and not shown.