
The short answer
Kaiserreich (pronounced roughly KY-zer-rysh) is German for “empire”, specifically an empire ruled by a Kaiser, an emperor. Literally it means “emperor's realm”.
Breaking the word down
| Part | Meaning | Notes |
|---|---|---|
| Kaiser | Emperor | Derived, like “Czar”, from the Roman title Caesar |
| Reich | Realm, empire, state | Also appears in words like Königreich (kingdom) and Frankreich (France) |
| Kaiserreich | Empire under an emperor | A realm whose head of state is a Kaiser |
German builds new words by joining nouns together. Kaiser plus Reich gives Kaiserreich, just as König (king) plus Reich gives Königreich, “kingdom”. See our guide on what Königreich means in English.
The historical Kaiserreich
In German history writing, das Kaiserreich usually refers to the German Empire of 1871–1918: the state founded after the unification of Germany, with the King of Prussia as German Emperor. It ended with the abdication of Wilhelm II at the close of the First World War.
Historians use the term so often that many book titles simply say Das deutsche Kaiserreich. Austria-Hungary and Russia had emperors too, but in everyday German “the Kaiserreich” almost always means Germany's imperial period.
Why the mod is called Kaiserreich
The Hearts of Iron IV mod's full name is Kaiserreich: Legacy of the Weltkrieg. Its premise is in its tagline: “What if Germany had won World War 1?” In that timeline the German Empire, the historical Kaiserreich, never fell. By 1936, when the game begins, the Kaiser still rules and Germany sits at the centre of world politics.
The name therefore works on two levels: it describes the surviving German Empire, and it signals the whole alternate world built around that outcome.
And “Weltkrieg”?
Weltkrieg is German for “world war”. The mod uses it for the First World War, which in its timeline ended in a Central Powers victory. “Legacy of the Weltkrieg” means the world shaped by that outcome.
Related German terms you will meet in the mod
| Term | Meaning |
|---|---|
| Kaiser | Emperor |
| Reich | Realm or empire |
| Weltkrieg | World war |
| Reichspakt | The German-led alliance in the mod's setting (literally “imperial pact”) |
| Mitteleuropa | “Central Europe”, the German economic and political sphere |
A word of caution
“Reich” on its own is neutral in German and simply means realm. In English, though, it is strongly associated with Nazi Germany's “Third Reich”. Kaiserreich refers to the earlier imperial state, and the mod's setting is a different history in which that later regime never appears in the same form.
Summary
- Kaiserreich = empire ruled by a Kaiser; literally “emperor's realm”.
- Historically it usually means the German Empire, 1871–1918.
- The mod imagines that empire surviving after winning the First World War.
Ready to play? Start with our Kaiserreich download guide.
Get Kaiserreich 1.7
Free mod for Hearts of Iron IV, straight from the official GitHub repository.


