Manga The Warning (2018-)

An enormous machine slowly materializes in a major West Coast city. Who sent it—and why—is a mystery, understood only by the malevolent beings gliding silently toward Earth through the inky vastness of space. In response, a multinational combat brigade called Gladiator Two-Six is deployed. Outfitted with next-generation military science and weapons, they're tasked with stopping any extraterrestrial threat that emerges.