Military units are organized groups of personnel that work together to perform specific tasks within a military structure. These units can vary in size and function, ranging from small teams, like squadrons, to larger formations, such as divisions or corps. Each unit has a designated role, which can include combat, support, or logistics. Units are typically categorized by their capabilities, such as infantry for ground combat, artillery for long-range fire support, and aviation for air operations. The organization of these units allows for efficient command and control, enabling them to operate effectively in various military operations.