This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
DescriptionSovetskogo Soyuzsa or suggested unitary RSFSR plus non-Alaska territory (1866) and near abroad.png
English: Orthographic projection of Greater Russia / Eurasia and near abroad
Dark redwood and maroon: the Soviet Union in 1945
Maroon: Soviet territories never part of the Russian Empire: Tuva, East Prussia, Western Ukraine and southern Kurils
Cornell red: Russian Empire territories that did not become part of the Soviet Union: Finland, Congress Poland and Kars Oblast
Red (RGB): The Soviet near abroad, 1955: Warsaw Pact and Mongolia
Pink: Russian Empire's sphere of influence and Soviet military occupation (Northern Iran, Xinjiang, Manchuria, Eastern Europe, North Korea and Afghanistan
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.