Operation Overlord is an Allied offensive operation involving an air and sea landing in Normandy (northern France), which began on June 6, 1944, and officially ended on August 30 of the same year. On the Allied side, in the first several days of the operation, about 1.4 million soldiers took part in it, and this number finally increased to about 2.1 million people. The commander-in-chief was the American General DD Eisenhower. By the way, the later president of the USA in 1953-1961. On the German side, approx. 0.3 million soldiers were fighting initially, with a total force estimated at approx. 0.65 million people. The formal commander in chief was Field Marshal Gerd von Rundstedt. Plans for the Western Allies' landing operations in Europe had been developed since 1942, but their final form crystallized in 1943. The operation, which was eventually codenamed Overlord, assumed the landing of allied forces - Americans and British, but also Canadians, Free French troops, and later Poles - in Normandy, with simultaneous sea and air landing. It assumed the involvement of a gigantic flotilla of auxiliary and landing craft (over 4,000 vessels in total) and over 10,000 aircraft. For this reason, Operation Overlord has gone down in history as the largest landing operation in the history of wars! The operations began on June 6, 1944 (the so-called D-Day) with the Allied landing on the beaches of Normandy. After the capture of the bridgeheads and their merger, there was a period of stalemate and the impossibility of penetrating the German defense, as exemplified by the repeated Allied attacks on the city of Caen. The breakthrough was only Operation Cobra at the end of July 1944, which led to the breakthrough and the exit to the rear of the German troops. As a result of this maneuver, the German retreat took place, which cost the Wehrmacht a lot of effort and resources. The political and military effect of the operation was the liberation of Paris and the lion's share of France, and the actual creation of the so-called Of the 2nd front in Europe.The M4 Sherman was an American medium tank from the Second World War. The first prototypes were built in 1941, and serial production was carried out in the period 1942-1945. In total, about 49,000 copies of this tank of all versions were created, which makes it one of the most produced tanks of the Second World War and the most important tank in the equipment of the Allied armies during this conflict. The M4 Sherman was powered by a single engine version of the M4A1 Continental R 975 C4 with a power of 400 hp . The vehicle was armed with - depending on the version - a single 75mm M3 cannon or a 76mm M1 cannon or a 105mm M4 howitzer and two 7.62mm Browning1919A machine guns. The M4 Sherman was developed as the successor to the M2 and M3 tanks, although it used many of the latter's components. First of all, it only used a slightly changed chassis of the M3 Lee car. When designing the M4 Sherman, the emphasis was primarily on playing the role of an infantry support vehicle, and not fighting enemy tanks - this was the role of American tank destroyers. Only possible clashes with the carts were assumed Pz.Kpfw III and Pz.Kpfw IV. A significant role was also played in the mass production of the new tank and the lowest possible production costs. The result was a tank with good armament for 1942 and early 1943, average armor, but with a tilted front plate, but also with poor maneuverability and - especially in the first versions - very susceptible to fire as a result of hitting the engine compartment . At the same time, however, a tank was created that could be truly large-scale production and had a significant modernization potential. Many development versions were created in the course of serial production M4 Sherman. Chronologically the first was the M4A1 version that already had a cast armor. Another - M4A2 - had welded armor and a new General Motors 6460 engine with 375-410hp, but much less prone to fire. A version of the M4A3 also appeared, armed with a 105 mm howitzer and powered by a Ford GAA engine with a capacity of 450 HP. Based on the M4A3 version, two sub-versions were created: the M4A3E2 Jumbo with reinforced armor and the M4A3E8 with the HVSS and 76mm gun. An interesting development version was also the T34 Calliope with mounted missiles not guided on the turret. The M4 Sherman was also supplied in huge numbers to the British and Red Army. The former developed a version of the Firefly based on it, with a great 17-pounder anti-tank gun. During World War II, M4 Sherman tanks fought in North Africa (1942-1943), Italy (1943-1945), during the battles in Normandy, France and West Germany (1944-1945), but also in the Pacific or in the ranks The Red Army on the Eastern Front. After World War II, the M4 Sherman was used in many countries, including Argentina, Belgium, India, Israel, Japan, Pakistan and Turkey. He also took part in many post-1945 conflicts, including the Indo-Pakistani War of 1965 and the Six-Day War of 1967.The Pz.Kpfw VI (Sd.Kfz.181) Tiger is a German heavy tank from World War II, one of the most famous combat vehicles of that time. The command of the German Panzerwaffe had the idea of creating a heavy tank from the beginning of the war, but the first attempts in the form of the centuries-old Neubaufahrzeuge tank turned out to be unsuccessful. In 1939 and 1940 they were conducted ineffectively, but after the clash with the T-34 and KW-1 on the eastern front, work on the new heavy tank sped up. On April 20, 1942, the prototype of the new tank, under the designation VK 4501 (H), underwent field trials in the presence of Adolf Hitler and was put into mass production shortly after. The first production versions were designated Pz.Kpfw VI Ausf.H1 (later Ausf.E). In the course of production, in the years 1942-1945, the tank was systematically modified by, for example, adding Feifell dust filters, different placement of headlights, modernization of optical equipment, changes to the commander's turret, etc. The drive was provided by a Maybach HL230 P45 12-cylinder carburetor engine with a capacity of 700 HP. The Pz.Kpfw VI tank, although it did not have such a contoured front hull as the T-34 or Pantera, was a heavily armored vehicle (frontal armor up to 120mm), armed with a very effective KwK 36 L / 56 88mm gun, which earned the reputation of being the most effective tank of the Second World War. It was a vehicle much better than the Allied M4 or Churchill and the Soviet T-34/76. He could also easily fight the IS-2 or M-26, surpassing them with the effectiveness of the main armament. On the other hand, the Pz.Kpfw VI had some disadvantages - first of all, it was extremely time-consuming to produce and had a very complicated suspension. In the later period of the war, the quality of the Tiger's armor also deteriorated, which resulted from the lack of access to the molybdenum deposits by the German economy. Despite these drawbacks, the Tiger on the battlefields proved to be a very effective weapon. He successfully fought in Tunisia, the Kursk Arch, Normandy and on the Eastern Front. Technical data: length (with a barrel): 8.45m, width: 3.7m, height: 2.93m, engine power: 700KM, weight: 56.9 t, range (on the road): 100km, maximum speed (on the road) ): 38 km / h, armament: 1 88 mm KwK 36 L / 56 gun, 3 7.92 mm MG 34 machine guns.