ich müde war, ging ich

when I was tired, I went

→ ich
phrase Rare #44,453
when I was tired, I went This is an example of German subordinate-clause word order followed by the main clause. It is most naturally used with a conjunction such as als, da, weil, or dieweil. The term itself is an illustrative word order pattern rather than a fixed idiom.
GE: Als ich müde war, ging ich zu Bett. Die Wortfolge in „ich müde war, ging ich“ zeigt die Satzstellung mit Nebensatz und Hauptsatz.
EN: When I was tired, I went to bed. The word order in “ich müde war, ging ich” shows the structure of a subordinate clause and a main clause.

Weil ich müde war, ging ich früh zu Bett.

Because I was tired, I went to bed early.

Da ich müde war, ging ich schlafen.

Since I was tired, I went to sleep.

Als ich müde war, ging ich zu Bett.

When I was tired, I went to bed.

Dieweil ich müde war, ging ich zu Bett.

Because I was tired, I went to bed.