La Guerra Interminable is a French comic (I had it in spanish) based on a book of Joe Hadelman, about a future where humans know how to travel through space and time.
A future where the relativity theory is proved, so humans can travel really huge distances and time compresses for them (just a few months pass) while in the rest of the universe years pass by. So combats are done taking not only the present but also the future in mind.
And a future where humans encounter other race (the Taurians) and start an endless war, a forever war in space & time.
A really curious comic, hard and cruel sometimes but also with nice thinking about how would be a war having time jumps and spanning centuries of fighting. Recommended if you like sci-fi themes.