arobelsk camp were executed in the Kharkiv NKVD building, later secretly buried on the grounds of an NKVD pansionat in Pyatykhatky forest (part of the Katyn massacre) on the outskirts of Kharkiv. The site also contains the numerous bodies of Ukrainian cultural workers who were arrested and shot in the 1937�38 Stalinist purges.
German occupation
During World War II, Kharkiv was the site of several military engagements. The city was captured and recaptured by Nazi Germany on 24 October 1941; there was a disastrous Red Army offensive that failed to capture the city in May 1942; the city was successfully retaken by the Soviets on 16 February 1943, captured for a second time by the Germans on 15 March 1943 and then finally liberated on 23 August 1943. Seventy percent of the city was destroyed and tens of thousands of the inhabitants were killed. Kharkiv, the third largest city in the Soviet Union, was the most populous city in the Soviet Union captured by the Germans, since in the years preceding World War II, Kiev was by population the smaller of the two.
The significant Jewish population of Kharkiv (Kharkiv's Jewish community prided itself with the second largest synagogue in Europe) suffered greatly during the war. Between December 1941 and January 1942, an estimated 30,000 people (slightly more than half Jewish) were killed and buried in a mass grave by the Germans in a ravine outside of town named Drobitsky Yar.
During World War II, four battles took place for control of the city:
� First Battle of Kharkov
� Second Battle of Kharkov
� Third Battle of Kharkov
� Fourth Battle of Kharkov (See also Operation Polkovodets Rumyantsev)
Before the occupation, Kharkiv's tank industries were evacuated to the Urals with all their equipment, and became the heart of Red Army's tank programs (particularly, producing the legendary T-34 tank
