When did the army start marching?

The concept of marching in military formations dates back to ancient times, with organized armies practicing coordinated movements as early as 3000 BC in civilizations like Mesopotamia and Egypt. However, the formalization of marching as a military discipline became more pronounced in the late Middle Ages and into the Renaissance, particularly with the rise of gunpowder warfare in the 16th century. This emphasis on discipline and synchronization was crucial for the effectiveness of armies in battle.