The War for Earth. (Azur Lane x Girls Frontline x Arknights x Honkai Impact)

"At February 17, 2028. All four of the unknown aggressors arrived at earth, to take over our lives. The Sirens, an all girls alien forces rained hell upon Naval forces of Earth. Sangvis Ferri, All machine-girls wreaked havoc the ground forces of the Allied forces. Reunion, under the leadership of Talulah, assault and hunted down Leaders of the World, and the Houkais, infecting civilians into zombie like soldiers. But... There's no Azur Lane to deal with the Sirens, no Rhodes Island to hunt the Reunion, no G&K PMC's to fight the Sangvis Ferri and no Valkyrja to go against the Houkais. Humanity is on the last stand and the United Nation's Council knew the risk and decided to fund the Phoenix Frontier Corporation a small but advanced tech PMC Company. And at March 6, 2028. It's the day that we finally on the offence against them and their supporters. Because we... are the Phoenixs, Defenders of Earth and her people."

Except slow upload.