You remember those Deathlands guys, with their gender equality and their gun fetishism and their occasional mutations and their ability to teleport around the shattered ruins of the United States trying to find that perfect settlement for forever but otherwise righting wrongs while they keep ending up in the wrong place? Well, in Red Equinox, they got a callback to the second book in the series, which you undoubtedly remember is the one where they teleported for the first time, and ended up in Alaska where they could run into some invading Russians at the land bridge.
How can such a callback exist, you ask? See, this guy got to report on first American contact in the hundred years since the nuclear war, and so he got promoted home to Moscow. And meanwhile, Ryan Cawdor and company got to learn that the American embassy in Moscow has the same teleportation capability as so many of the hidden redoubts scattered around the Deathlands. None of which sounds so terrible, because you just leave, you know? Moscow is like the most dangerous place for an American to be! …too bad they broke the door you need to close to trigger the teleport sequence, eh?