Question: What was the name of the military operation where on June 26, 1941, the leader of the 2nd tank division was killed?
Sentence (from "28th Mechanized Corps (Soviet Union)"): The corps included the previously formed 6th Tank Division at Vagharshapat, the 54th Tank Division at Leninakan, and the 236th Motorized Division at Ashtarak.
Relevant evidence: No