That is a problem with time travel, which isn't really pointed out. Go back in time, and you are in space as Earth went away and rotated.
And there's more! The entire solar system is rotating about the galactic axis at about 500,000 MPH. The Milky Way galaxy is moving at about twice that speed.
So time travel could be a massive variation of "where the hell did the aircraft carrier go?"
If we have to march off into the next world, let us walk there on the bodies of our enemies.