What wars has the machine gun been used in?

The machine gun has been used in numerous conflicts since its invention in the late 19th century. Notably, it played a significant role in World War I, where it contributed to the devastating trench warfare tactics. Subsequent conflicts, including World War II, the Korean War, the Vietnam War, and various modern conflicts, have also seen extensive use of machine guns. Their impact has fundamentally changed infantry tactics and warfare strategies across these wars.