Kotaro Purge
The Kotaro Purge is Great Scorria's answer to the migrant crisis.
The Purge displaced an estimated 80.000~100.000 people from the city of Kotaro and the state of the same name after the terrorist attack on Kotaro in March of 2019, killing off 54 people.
The primary reason lies in Kotaro lying on the far east of mainland Great Scorria with Porowon being on the other side of the sea. In recent years, Porowon's current president, George Wangjia, has become overtly nationalist and has banned selected groups of people, most notably Muslims (after an incident in May 2019) from his country. The city of Kotaro itself has long been considered a hotbed for hatred towards "Poros" (ethnic Porowonians), Sondrians and Muslims.
The Purge not only displaced people that Wangjia hated, but also selected groups of white locals who don't want to live in a tense atmosphere.