USSR
polity · 1920 AD–1993 AD
USSR, a polity recorded 1920 AD–1993 AD: 4 mapped boundaries, cited to 1 source, on an interactive historical map you can move through time.
Recorded boundaries
| Period | Control | Confidence | Evidence | Notes |
|---|---|---|---|---|
| 1920 AD–1929 AD | administrative control | high confidence | observed at 1920 AD | — |
| 1938 AD–1944 AD | administrative control | high confidence | observed at 1938 AD | — |
| 1945 AD–1959 AD | administrative control | high confidence | observed at 1945 AD | — |
| 1960 AD–1993 AD | administrative control | high confidence | observed at 1960 AD | — |
Each row is a snapshot the source recorded, not a continuous history. The period between two observations is an inference this atlas shows rather than hides.