Justice League United, Volume 1 by Jeff Lemire

A newly formed branch of the Justice League is dispatched to protect a different region of the world, forcing a diverse group of heroes to learn to work together amid rising supernatural and extraterrestrial threats. The volume focuses on team dynamics, political fallout, and personal tensions as secrets and pasts are revealed, pushing the heroes to redefine their roles and make hard choices to keep both civilians and each other safe.