The PaK 40 is a German anti-tank gun that was widely used during World War II. Introduced in 1941, it was designed to counter the increasing armor of enemy tanks. The gun had a caliber of 75 mm and was known for its effectiveness against various armored vehicles, making it a crucial asset for German forces. The PaK 40 could be towed by vehicles or used in a fixed position, providing flexibility on the battlefield. Its design allowed for a high rate of fire and good penetration capabilities, which made it a formidable opponent for Allied tanks throughout the war.