Krasnoarmejskoe was formerly part of the German Empire. In the German Empire, the place was called Sollau.
The place is now called Krasnoarmejskoe and belongs to Russian Federation.
| Historical place name | Country | Administration | Time |
|---|---|---|---|
| Alt Sollau | German Empire | Preußisch Eylau | 1914 |
| Sollau | German Empire | Preußisch Eylau | 1939 |
| Zolljau | Under Soviet administration | Kaliningrad | 1945 |
| Krasnoarmejskoe | Russian Federation | Bagrationovsk | 1992 |