An interesting 2014 read on their inclusion re: national defence matters: https://icds.ee/wp-content/uploads/2014/Juhan_Kivirahk_-_Int...
An interesting 2014 read on their inclusion re: national defence matters: https://icds.ee/wp-content/uploads/2014/Juhan_Kivirahk_-_Int...
While only roughly 300,000 to 450,000 of 1.3 million of Estonians have ethnic ties to Russia, 73% are near Estonia’s border with Russia:
https://www.globalsecurity.org/military/world/europe/et-peop...
This YouTube provides an animated history of Estonian borders:
However, it generally follows the pre-1917 borders of the Governorates of Estland and Livonia.
https://commons.wikimedia.org/w/index.php?curid=352476
I was unable to find a map overlaying pre-1917 borders and current borders.
So the border is old but the ethnic borders are very new and based on very recent Russian colonisation.
https://wikipedia.org/wiki/Narva
Of note, “The status of Narva was resolved in a July 1917 referendum, when the district population, at that time roughly equally divided between ethnic Russians and Estonians, voted to attach itself to the newly autonomous and soon to be independent republic of Estonia.”
One could move quite freely by 1970-ish.
Except that you could not have permanent residence in Moscow and Leningrad.