An "Army Group" is a large military formation that typically consists of two or more armies, along with supporting units. It is designed to conduct major operations and campaigns, often over a wide geographical area. Army Groups are usually commanded by a general and can include various branches of the military, such as infantry, armor, and artillery. In historical contexts, such as during World War II, Army Groups played crucial roles in strategic planning and execution. For example, the German Army Group Center was instrumental in the invasion of the Soviet Union. These formations are essential for coordinating large-scale military efforts and ensuring effective command and control.