I'm going back to Cantigny and I know where I'm at.

You can come if you want to or you can go and get caught by the Germans if you want to.

I went a hundred miles through Germany and they didn't catch _me_--'cause I always know where I'm at." He went on for a few steps, Roscoe, after the first shock of surprise, following silently behind him.

He saw Tom stumble, struggle to regain his balance, heard a crunching sound, and then, to his consternation, saw him sink down and disappear before his very eyes.
In the same instant he was aware of a figure which was not Tom's scrambling up out of the dark, leaf-covered hollow and of the muzzle of a rifle pointed straight at him.
Evidently Tom Slade had not known "where he was at" at all..