On April 30, 1945, after a decisive assault at 21.50 minutes, the soldiers of the 1st rifle battalion (commander - Captain S.A. Neustroev) of the 756th regiment installed the Victory Banner on the roof of the Reichstag!
Attaching extremely important political and military significance to the battles to capture Berlin, the Military Council of the 3rd Shock Army of Colonel-General Kuznetsov, even before the start of the offensive, established the red banners of the Military Council. These banners were presented to all rifle divisions of the army.
The commander of the 150th rifle division, which came to the immediate approaches to the Reichstag, General Shatilov handed the Red Banner of the Army Military Council No. 5 to the commander of the 756th regiment, Colonel Zinchenko. For hoisting the banner, the colonel assigned Neustroev's battalion. Other units also took part in the assault on the Reichstag, each of which had its own Red Banner - the 1st battalion of Davydov, the 1st battalion of Senior Lieutenant Samsonov from the 380th rifle regiment, two assault groups of the 79th rifle corps under the command of Major Cooper and Captain Makov. Many ordinary soldiers made their own, personal red banners, which they made from scrap materials, right down to the red covers of books. The hearts of the soldiers burned with fire and everyone wanted to end the war.
At 13:30, artillery preparation for the assault began: about 100 guns, including 152-mm and 203-mm howitzers, were firing. The assault began - the enemy opened heavy fire on the attacking units. The assault units were pinned to the ground by enemy fire and could not advance towards the Reichstag. The first assault on the Reichstag was not successful, in the subunits, instead of the fighters and officers who were out of action, replenishment was sent, the objects for the attack were clarified, and the artillery was pulled up.
At 18 o'clock, a new assault began, this time successful: Soviet soldiers reached the Reichstag and burst into the building. On one of the stairwells, the fighters of the Neustroev battalion: Makov, Zagitov, Lisimenko and Sergeant Minin, paving the way with grenades and fire from machine guns, broke through to the roof and installed a red banner on the Reichstag tower.
The banner of the Military Council of the 3rd Shock Army was instructed to hoist the scouts of the regiment - Meliton Kantaria and Mikhail Yegorov. Together with a group of fighters led by Lieutenant Alexei Berest, with the support of Syanov's company, they climbed onto the roof of the building and at 9.50 pm on April 30, 1945, hoisted a red flag. By the morning of May 1, when the Reichstag was practically cleared of the Nazis, the Victory Banner was already flying over Berlin.
The above is the canonical version of the first hoisting of the red banner over the Reichstag. There are others.
The combat log of the 3rd Shock Army says that the already mentioned commander of the 1st Battalion of the 380th Infantry Regiment of the 171st Infantry Division, Captain Samsonov, was the first to break into the Reichstag building, and his soldiers hoisted the banner in the window of the Reichstag. There is also a version that the first to reach the Reichstag on April 30 were the soldiers of the reconnaissance group under the command of Sorokin, and the first to hoist a banner made from a feather bed (a feather bed was found in the seized building of the Ministry of Internal Affairs), a fighter from this group, Grigory Bulatov, who then tried to prove his feat for many years. The banner was hoisted over the dome by fighters Leonid Gorychev, Abdulhakim Ismailov and Alexey Kovalev. Also, there is no exact answer who is depicted in the legendary photo of Yevgeny Khaldei.
Be that as it may, the proceedings "who is the first" globally have little effect and in no way diminish the great feat of all those warriors who, starting the battles on April 16, in 2 weeks of heated battles, crushed the hated enemy and took his capital city by decisive storm Berlin. The Victory Banner announced this feat to the whole world, demonstrating not only a military, but also a moral victory over Nazism.