Codename: Xuanniao

In 2100 AD, as the Kingdom of China announced that the first Blackbird-class space frigate was successfully launched, it meant that mankind had officially entered a new era of great navigation. In 2160 AD, sixty years have passed since mankind entered the Age of Discovery. During these sixty years, mankind's technological explosion began due to extraterrestrial materials, and countless countries announced that they had entered the Age of Discovery. In 2200 AD, mankind has completely established its foothold in the Milky Way and began to try to explore new galaxies. At the same time, various countries on the earth established the Earth Destiny Federation, or EFC for short. At the same time, two military systems, the Galaxy Guardian Army (MWA) and the Earth Guard Army (TEA), were established under the jurisdiction of the Earth Destiny Consortium. Under these two military systems, the Galaxy Fleet and the Earth Fleet were established respectively. One was used for expeditions and the other was used to defend the earth in order to deal with sudden crises. In 2250 AD, after 150 years of exploration, mankind finally discovered the first alien civilization, the Tengu people. In 2270 AD, humans have discovered hundreds of alien civilizations. Everything seems to indicate that humans will soon gain a firm foothold in the large family of space civilizations. However In 2300 AD, perhaps mankind's peaceful exploration broke some rules of the game and was besieged by hundreds of alien civilizations. This newly emerged, brand-new, and vibrant civilization was just forced back.