The 7th Army was a World War I

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

 and World War II

World War II

World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

 field army

Field army

A Field Army, or Area Army, usually referred to simply as an Army, is a term used by many national military forces for a military formation superior to a corps and beneath an army group....

 of the German land forces.
The 7th Army was activated in Stuttgart

Stuttgart

Stuttgart is the capital of the state of Baden-Württemberg in southern Germany. The sixth-largest city in Germany, Stuttgart has a population of 600,038 while the metropolitan area has a population of 5.3 million ....

 on August 25, 1939 with General Friedrich Dollmann

Friedrich Dollmann

Friedrich Dollmann was a German general during World War II, most notably serving during the early phases of the D-Day Invasion....

 in command. At the outbreak of the war, the 7th Army defended the German border and manned the Westwall in the Upper Rhine region. At the start of the Campaign in the West

Battle of France

In the Second World War, the Battle of France was the German invasion of France and the Low Countries, beginning on 10 May 1940, which ended the Phoney War. The battle consisted of two main operations. In the first, Fall Gelb , German armoured units pushed through the Ardennes, to cut off and...

 in 1940, the 7th Army was part of General Wilhelm Ritter von Leeb

Wilhelm Ritter von Leeb

Wilhelm Josef Franz Ritter von Leeb was a German Field Marshal during World War II. - Youth :...

's Army Group C. On 14 June 1940, Army Group C attacked the Maginot Line

Maginot Line

The Maginot Line , named after the French Minister of War André Maginot, was a line of concrete fortifications, tank obstacles, artillery casemates, machine gun posts, and other defences, which France constructed along its borders with Germany and Italy, in light of its experience in World War I,...

 after it had been cut off by armored units of the XXXXI Panzer Corps.