The Latvian Socialist Soviet Republic.
Baku was the capital of the Azerbaijan Soviet Socialist Republic. As for the ethnic affinity, the Azerbaijanis are nearer to the Medes, the Persians than (the Iranians).
A
Belarus
Belarus
Baku (known for its large petroleum deposits) is the capital city of the Republic of AZERBAIJAN.
Belarus
Causasus Republic
It is the capital of Turkmenistan. (transliterated from Russian, the spelling is Ashkhabad).
Georgia
Armenia
In 1922, the Union of Soviet Socialist Republics was formed as a merging of the following existing countries:Russian Soviet Federative Socialist RepublicTranscaucasian Socialist Federative Soviet RepublicUkrainian Soviet Socialist RepublicByelorussian Soviet Socialist RepublicThe Russian Soviet Federative Socialist Republic was formed in 1917, after the October Revolution, from most of the former Russian Republic, formerly known as the Russian Empire.