Terrakis

Terrakis is a foreign planet to Aros found just 47 light years away, in the Inner Andromeda Galaxy. Terrakis is home to the human-like species 'Terrakans' that are indistinguishable from Aroseans apart from slightly larger noses, red-brown eyes and longer legs in proportion to their torsos. It is said Terrakans are from the same ancestral species as Aroseans, and an ancient alien species crashed on both planets, prohibited from leaving, and slowly had to relearn civilisation from the ancient history of the planets until now.
Terrakis is a Type II civilisation, a few points ahead of Aros, which means it is highly advanced and powerful. Due to this Terrakis is starting to look to colonise new planets, and their most valued target is Aros. Aros defended itself in a short invasion that lasted 10 weeks just a year ago in 2016, when 12 Terrakan ships penetrated the atmosphere defences of Aros and started roaming the streets of cities and towns, searching for citizens to take and experiment on. In these 10 weeks alerts on all Electronic devices were played to warn their citizens to 'Hide in a dark room with minimal windows or entrances'. Citizens of major cities were transported via the Aros Hyperloop to underground shelters below Xi'huan. After this incident the citizens of Aros returned to normal life and work, and the world's gears started turning again.
Also in the Planet Sirus, the Terrakis invaded the Northern hemisphere of Sirus, killing 10 billion natives. After the UASN and the all other nations united to fight against the Terrakis, the Terrakis were finally overcome, and ruthlessly massacred. The people of Sirus finally had gotten their victory.