The Old Guard Book 1 Opening Fire (comics)

Collecting the critically acclaimed mini-series by Greg Rucka and Leandro Fernandez. Old soldiers never die...and some of them don't even fade away. Cursed with immortality, Andromache of Scythia and her comrades-in-arms ply their trade for those who can find--and afford--their services. But in the 21st century, being immortal is a difficult secret to keep, and when you live long enough, you learn that there are many fates far worse than death.

Collecting issues 1 through 5.