The 7.65mm Parabellum, also known as 9mm Parabellum or 9x19mm, is a popular cartridge used in various firearms. Originally developed in the early 20th century, it was designed for military and law enforcement applications. The cartridge is known for its balance of power and manageable recoil, making it suitable for both semi-automatic and automatic weapons. This caliber gained widespread use during World War I and II, particularly in German firearms like the Luger P08 and MP40. Its versatility has led to its adoption by many countries and manufacturers, ensuring its continued relevance in modern shooting sports and self-defense scenarios.