Upon the German invasion of the Soviet Union, the 103rd Motorized Division was quickly deployed to the Western front. In July Gusakovsky had his baptism by fire while part of an infantry unit. In August he became the chief of staff of a tank regiment, and in September he was made the chief of staff of the 688th Motorized Rifle Regiment. When the regiment was disbanded in November he was reassigned to the 131st Separate Tank Battalion of the 50th Army. There he participated in battles for
Smolensk,
Yelnya,
Moscow,
Tula, and
Yukhnov. In February 1942 he was promoted to becoming the deputy chief of operations, and in April he became the chief of staff of the 112th Tank Brigade. When the commander of the brigade was killed during the Battle of Kursk in August 1943, Gusakovsky took command and the unit was soon awarded the Guards designation and renamed the
44th Guards Tank Brigade for its accomplishments in battle. On 12 August 1943 he was wounded for the first time. Having been officially made the brigade's commander in September, he led the unit in the offensive for the
Western Bug in July 1944. On 23 September 1944 he was awarded the title Hero of the Soviet Union for his role in the
Lvov–Sandomierz Offensive. During the
Vistula-Oder Offensive his brigade maintained a bridgehead on the Pilitsa River. On 17 January 1945 they expelled German forces from
Łowicz. They continued to advance through Eastern Europe, taking 10 axis tanks, 59 armored vehicles, 43 guns, 12 self-propelled guns, and 6 warehouses. 4000 Axis soldiers were either killed or captured in the process. He was again awarded the title Hero of the Soviet Union on 6 April 1945 for his leadership during the offensive. On 27 April 1945 he was wounded during the Battle for Berlin. Having entered the war as a senior lieutenant, Gusakovsky was a colonel in commanded of a decorated brigade by the end of the war. == Postwar ==