 Complete the following phrase:  The 7th Mechanized Corps was a mechanized corps of the Red Army, formed three times. The corps was first formed in 1934 in the Leningrad Military District and was converted into the 10th Tank Corps in 1938. The corps was reformed in the summer of 1940 in the Moscow Military District and fought in the Battle of Smolensk, after which its headquarters became part of Group Yartsevos headquarters. The corps was formed a third time in August and September 1943. The third formation fought in the DnieperCarpathian Offensive, UmanBotoșani Offensive, Second JassyKishinev Offensive, 