On December 21, 1896, the legendary Marshal and twice Hero of the Soviet Union, Konstantin Konstantinovich Rokossovsky, was born. The troops under his command fought in the most significant battles of the Great Patriotic War, including the battles of Moscow, Stalingrad, and Kursk. They also participated in the liberation of Belarus, the defeat of German forces in East Prussia, and the battle for Berlin. On various fronts, Konstantin Konstantinovich consistently demonstrated exceptional military talent and the ability to think and act unconventionally. During the Battle of Stalingrad, under Rokossovsky’s command, multiple fronts organized an encirclement of General Paulus's army. In the Battle of Kursk, Konstantin Konstantinovich showcased extraordinary military expertise in organizing and executing artillery counter-preparation, repelling the German offensive, and subsequently leading the counteroffensive. During the Belarusian operation, it was Rokossovsky who proposed delivering two powerful converging strikes by the 1st Belarusian Front. Contemporaries of the legendary Marshal noted his modesty, charm, fair strictness, and dedication to preserving the lives of his soldiers. Unsurprisingly, he was regarded with both respect and great warmth by his troops. Konstantin Konstantinovich made a profound mark on military art, developing a distinctive command style. He left invaluable memoirs for future generations, titled The Duty of a Soldier. For Rokossovsky, this duty meant fighting better than the enemy.