The 8.8 cm Flak 18/36/37/41 is a German 88 mm anti-aircraft and anti-tank artillery gun, developed in the 1930s. It was widely used by Germany throughout World War II and is one of the most recognized German weapons of the conflict. The gun was universally known as the Acht-acht ("eight-eight") by the Germans and the "eighty-eight" by the Allies. Due to its lethality, especially as a tank killer, the eighty-eight was greatly feared by Allied soldiers.
The Sturmgeschütz III was an assault gun produced by Germany during World War II. It was the most-produced fully tracked armoured fighting vehicle, and second-most produced German armored combat vehicle of any type after the Sd.Kfz. 251 half-track. It was built on a slightly modified Panzer III chassis, replacing the turret with an armored, fixed superstructure mounting a more powerful gun. Initially intended as a mobile assault gun for direct-fire support for infantry, the StuG III was continually modified, and much like the later Jagdpanzer vehicles, was employed as a tank destroyer.
The Turán tanks were a series of Hungarian medium tanks of World War II. They were produced in two main variants: the original 40M Turán with a 40 mm gun and later the 41M Turán with a short-barreled 75 mm gun, improved armour and a new turret. A total of 285 40M Turán I tanks were made. The 40M Turán was originally inspired by and used the features found on the design of the Czechoslovak Škoda T-21 medium tank prototype. The Turán tanks fought on the Eastern Front against the Soviets, and in the defence of Hungary.
The Ordnance Quick-Firing 6-pounder 7 cwt, or just 6-pounder, was a British 57 mm gun, serving during the Second World War as a primary anti-tank gun of both the British and United States Army. It was also used as the main armament for a number of armoured fighting vehicles.
The 7.5 cm Pak 40 was a German 75 millimetre anti-tank gun of the Second World War.
The Pak 36 is a 3.7 cm / 37mm caliber German anti-tank gun used during the Second World War. It was the main anti-tank weapon of Wehrmacht Panzerjäger units until 1942. Developed by Rheinmetall in 1933, it was first issued to the German Army in 1936, with 9,120 being available by the beginning of the war in September 1939 and a further 5,339 produced during the war. As the predominant anti-tank gun design in the world during the late 1930s, demand was high for the Pak 36, with another 6,000 examples produced for export and the design being copied by the Soviet Union as the 45 mm anti-tank gun M1932 (19-K) and by other nations such as Japan.
The 152 mm howitzer-gun M1937 (ML-20), is a Soviet heavy gun-howitzer. The gun was developed by the design bureau of the plant no 172, headed by F. F. Petrov, as a deep upgrade of the 152-mm gun M1910/34, in turn based on the 152-mm siege gun M1910, a pre-World War I design by Schneider. It was in production from 1937 to 1946. The ML-20 saw action in World War II, mainly as a corps / army level artillery piece of the Soviet Army. Captured guns were employed by Wehrmacht and the Finnish Army. Post World War II, the ML-20 saw combat in numerous conflicts during the mid to late twentieth century.
The ZiS-2 is a Soviet 57 mm anti-tank gun used during World War II. The ZiS-4 is a version of the gun that was meant to be installed in tanks. ZiS stands for Zavod imeni Stalina, the official title of Artillery Factory No. 92, which produced the gun first.
The D-1 howitzer M1943 is a Soviet World War II-era 152.4 mm howitzer. The gun was developed by the design bureau headed by F. F. Petrov in 1942 and 1943, based on the carriage of the 122 mm howitzer M1938 (M-30) and using the barrel of the 152 mm howitzer M1938 (M-10). The powerful and mobile D-1, with its wide range of ammunition, significantly increased the firepower and breakthrough abilities of Red Army tank and motor rifle formations. Several hundred D-1s were manufactured before the end of World War II.
152-mm howitzer M1938 (M-10) was a Soviet 152.4 mm howitzer of World War II era. It was developed in 1937–1938 at the Motovilikha Mechanical Plant by a team headed by F. F. Petrov. Although production of the gun was stopped in 1941, it saw combat with the Red Army until the end of World War II and remained in service until the 1950s. Captured pieces were used by Wehrmacht and the Finnish Army. The latter kept the M-10 in service until 2000.
The 10.5 cm leFH 18 is a German light howitzer used in World War II and the standard artillery piece of the Wehrmacht, adopted for service in 1935 and used by all divisions and artillery battalions. From 1935 to the end of the war, 11,848 were produced, along with 10,265 of the leFH 18/40 variant.
The Pak 97/38 was a German anti-tank gun used by the Wehrmacht in World War II. The gun was a combination of the barrel from the French Canon de 75 modèle 1897 fitted with a Swiss Solothurn muzzle brake and mounted on the carriage of the German 5 cm Pak 38 and could fire captured French and Polish ammunition.
25 mm automatic air defense gun M1940 (72-K) was a Soviet 25 mm caliber anti-aircraft gun used during the Great Patriotic War. The gun was developed from the end of 1939 to the beginning of 1940 at 8th Kalinin Artillery Plant under the guidance of its Chief Designer Mikhail Loginov, supervised by Lev Loktev. The cannon was given the factory code 72-K before being accepted into service by the Red Army as the 25 mm automatic air defense gun M1940.
The Cannone-Mitragliera da 20/77 (Scotti) was a 20 mm anti-aircraft gun produced by the Scotti company in Italy, used in World War II, firing a 20x138mmB cartridge.
The 10 cm M. 14 Feldhaubitze was a dual-purpose field and mountain gun used by Austria-Hungary during World War I. Between the wars it was used by Austria, Italy, Russia and Poland. During World War II it served as the standard medium howitzer of the Royal Italian Army with the designation Obice da 100/17 modello 14 and after 1943 captured weapons were used by Nazi Germany's Wehrmacht under the designations 10 cm leFH 14(ö) and 10 cm leFH 315(i). After World War II an updated howitzer remained in service with the Italian Army until 1975.
The 8 cm Feldkanone M.5 was a field gun used by Austria-Hungary during World War I. It was a conventional design, with its most notable feature being its obsolescent autofrettaged bronze barrel, necessary because Austria-Hungary still had trouble making steel of the proper quality.
The 15 cm Autokanone M. 15/16 was a heavy field gun used by Austria-Hungary in World War I. Guns turned over to Italy as reparations after World War I were taken into Italian service as the Cannone da 152/37. Austrian and Czech guns were taken into Wehrmacht service after the Anschluss and the occupation of Czechoslovakia as the 15.2 cm K 15/16(t). Italian guns captured after the surrender of Italy in 1943 were known by the Wehrmacht as the 15.2 cm K 410(i). Due to their unique ammunition, the Germans did not use them that much, and generally served on coast-defense duties during World War II.
The 10.4 cm Feldkanone M. 15 was a heavy field gun used by Austria-Hungary in World War I. It was derived from the successful 15 cm schwere Feldhaubitze M 14 modified to fire high-velocity 104-mm projectiles.
The 15 cm schwere Feldhaubitze M 14 was a heavy howitzer which served with Austria-Hungary during World War I.
The 24 cm Kanone M. 16 was a super-heavy siege gun used by Austria-Hungary during World War I and by Nazi Germany during World War II. Only two were finished during World War I, but the other six were completed in the early twenties and served with the Czechoslovak Army until they were bought by the Germans after the German occupation of Czechoslovakia in 1938. During World War I, one gun served on the Western Front and the other on the Italian Front. During World War II, they saw action in the Battle of France, Operation Barbarossa and the siege of Leningrad.
Italy 
Nazi Germany 
Hungary