Question: The title of 'Hero City' was given to which Soviet City first?
About the article "Operation Barbarossa", section "Events".

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Brest Fortress (, '; , '; ), formerly known as Brest-Litovsk Fortress, is a 19th-century Russian fortress in Brest, Belarus.
It is one of the most important Soviet World War II war monuments commemorating the Soviet resistance against the German invasion on June 22, 1941 (Operation Barbarossa).
Following the war, in 1965 the title Hero-Fortress was given to the Fortress to commemorate the defence of the frontier stronghold during the first weeks of the German-Soviet War.
It was then part of the Byelorussian SSR.
The title Hero-Fortress corresponds to the title Hero City, that was awarded to an eventual total of twelve Soviet cities. 
Hero Fortress (Russian: крепость-герой, "krepost'-geroy") is the honorary title awarded to the Soviet Brest Fortress, now in Brest, Belarus (then part of the Byelorussian SSR) in 1965 for the defence of the frontier stronghold during the very first weeks of the German-Soviet War of 1941 to 1945.
The title Hero Fortress corresponds to the title Hero City, that has been awarded to the total of twelve Soviet cities. 
Hero City (, , ) is a Soviet honorary title awarded for outstanding heroism during World War II (Eastern Front is known in the Soviet Union as The Great Patriotic War).
It was awarded to twelve cities of the Soviet Union.
In addition the Brest Fortress was awarded an equivalent title of Hero Fortress.
This symbolic distinction for a city corresponds to the individual distinction Hero of the Soviet Union.
According to the statute, the hero city is issued the Order of Lenin, the Gold Star medal, and the certificate of the heroic deed ("gramota") from the Presidium of the Supreme Soviet of the USSR.
Also, the corresponding obelisk is installed in the city. 
Soviet titles.
Hero of the Soviet Union.
The first hero title established, "Hero of the Soviet Union", was created by decree of the Presidium of the Supreme Soviet of the USSR on 16 April 1934.
The identifying badge, the "Gold Star Medal", was not created until 1 August 1939.
The title was awarded for ""personal or collective deeds of heroism rendered to the USSR or socialist society"" and it was awarded to both military personnel and civilians. 
Evidence from archeological finds and burial mounds from 30,000 BC indicates the Saltovo-Mayaki were Antratsyt's earliest ancestors.
Since the Saltovo-Mayaki were nomadic, the area was left uninhabited and considered part of the Wild Fields.
It was only in the late 16th century that the Don Cossacks claimed the area, protecting it from Tatar and Mongol raids, and started farming settlements.
In 1874, Cossack Ivan Dvuzhenov found coal nearby and by 1904, the Antratsyt Bokovsky Coal Mine was built.
A small settlement grew around the mine and soon after, the Kolberg Coal Mine was built in 1912, allowing the settlement to grow and prosper.
In 1920, the town was officially named Bokovo-Antratsyt after its first coal mine, which was later shortened to Antratsyt (1962).
With the creation of the Soviet Union in 1922, the town became under the Ukrainian Soviet Socialist Republic's rule.
As an important center for coal extraction, the city was made a rayon center in 1936.
From 1942 to 1943, the city was occupied by Nazi troops.
Led by I.E.
Voropayeva, the city retaliated and regained its freedom.
A quarter of Antratsyt's population at the time (7100) were awarded military honors and of those awarded, six were given the title Hero of the Soviet Union and three were given the Order of Glory.