Length of Reichs

[Wulfhere]

First Reich 800-1806: 1006 years.
Second Reich 1871-1918: 47 years.
Third Reich 1933-1945: 12 years.

Plotting these on a graph, the next Reich should only last 10 years or so. Perhaps it's been and gone, and no one noticed.

[Eldritch]

Or maybe they've telepathically taken over the world already, and you weren't in on the plot.