According to Diana's intel, there appears to have been an incident between Erina and Zerix's factions.
Zerix, irritated that the tournament date had been pushed ahead, suddenly stormed Erina's factions stronghold with his entire faction to deal with her once and for all.
This sparked a huge faction war between the two groups.
Zerix's faction had the upper hand because it outnumbered Erina's faction and many members had already switched sides to join Zerix.
However, just when it appeared that Erina's faction would be defeated, our protagonist Lucas Eugene, along with other first-year students, joined the fight and helped prevent Erina's faction from being completely eradicated.
'...It was about time they met each other,' I thought inwardly.
"Did everyone blindly follow Lucas' orders and join the fight without a fuss?" I inquired of Diana as I was curious.