Question: What was the name of the military operation where on June 26, 1941, the leader of the 2nd tank division was killed?

Yegor Nikolaevich Solyankin (Russian: Егор Николаевич Солянкин ; 1901– 26 June 1941) was a Red Army major general.  Solyankin led the 2nd Tank Division during the Battle of Raseiniai, a Soviet counterattack after the German invasion of the Soviet Union.  He was killed in action during the defeat of his division. <SEP> The Battle of Raseiniai (23–27 June 1941) was a large tank battle that took place in the early stages of Operation Barbarossa, the German invasion of the Soviet Union.  The battle was fought between the elements of the German 4th Panzer Group (General Erich Hoepner) and the Soviet 3rd Mechanized Corps (Major General Alexey Kurkin) with the 12th Mechanised Corps (Major General Nikolai Shestapolov), in Lithuania, 75 km north-west of Kaunas.  The commander of the Soviet Northwestern Front, Colonel General Fyodor Kuznetsov, tried to contain and destroy the German troops that had crossed the Neman River (Nemunas) but was unable to prevent them from advancing.  The result of the battle was the destruction of most of the Soviet armoured forces of the Northwestern Front, which cleared the way for the Germans to attack towards the crossings of the Daugava River (Western Dvina).  The fighting around Raseiniai was one of the main battles of the initial phase of Operation Barbarossa, referred to in Soviet historiography as the Border Defensive Battles (22–27 June 1941) and formed part of the larger Soviet Baltic Strategic Defensive Operation. <SEP> The 16th Tank Division was a tank division of the Soviet Union's Red Army and later the Soviet Army, formed twice.  The division was first formed during the summer of 1940 at Kotovsk, Ukraine with the 2nd Mechanized Corps.  After the German invasion of the Soviet Union began in June 1941, the division was sent into the fighting along with its corps.  The division was destroyed along with its corps during the Battle of Uman.  The division was reformed in 1955 from the 111th Tank Division in the Soviet Far East, and was disbanded two years later. <SEP> The 13th Mechanized Corps was formed in March 1941 in Bielsk Podlaski as part of the 10th Army in the Western Special Military District.  Major General Pyotr Akhlyustin commanded the corps, Major General Vasily Ivanov was its deputy commander for combat troops, and Colonel Ivan Grizunov was its chief of staff.  The division's 25th Tank Division was formed from the 44th Light Tank Brigade at Gomel and was later relocated to Łapy.  The division had most of the corps' tanks.  The 31st Tank Division was formed from the 1st Tank Brigade (Second Formation) at Gmina Boćki.  By 30 May, the division had only one full tank regiment, the 62nd, with few armored vehicles.  The 208th Motorized Division was formed at Hajnówka from the 14th Motorized Machine Gun-Artillery Brigade.  With its positions in the center of the Białystok salient, the corps was to support the 5th Rifle Corps.  By 22 June, when the German invasion of the Soviet Union began, the corps had 294 light tanks, including 263 T-26s and 15 BT tanks.  A small number of T-34 and KV-1 tanks were transferred to the corps from the 6th Mechanized Corps for training purposes.  The corps was at 49 percent of its strength.