I Corps (Belgium)


The 1st Corps of the Belgian Army, was a Belgian army corps active during First World War, Second World War, and the Cold War.

World War II

Mobilization and Deployment (1940)

At the start of the Battle of Belgium on 10 May 1940, the I Corps was a frontline active formation of the Belgian Field Army. It held the strategically vital Albert Canal sector, stretching from the north of Liège towards the Antwerp defensive perimeter. The Corps was part of a mobilized force of 650,000 men and was among the best-equipped formations available to the General Staff.

Combat Operations

The Battle of Fort Ében-Émael occurred within the defensive sector of the Corps' 7th Infantry Division. German planners had recognised the need to eliminate Fort Ében-Émael if their army was to break into the interior of Belgium. It decided to deploy airborne forces to land inside the fortress perimeter using gliders. Using special explosives and flamethrowers to disable the defences, the Fallschirmjäger then entered the fortress. In the course of the battle, German infantry overcame the defenders of the I Belgian Corps' 7th Infantry Division in 24 hours. Despite the support of the organic 13th Corps Artillery, the breakthrough at the canal bridges forced the I Corps to retreat toward the K-W Line on 11 May 1940 to avoid encirclement.

Analysis of the 1940 Structure

The organization of the I Corps in May 1940 reflected the Belgian "Active Army" doctrine, characterized by several key factors:Strategic Weight: As an active corps, it held the highest-priority sector of the Albert Canal. The inclusion of two active divisions alongside the 7th made it one of the most powerful formations in the Field Army.Artillery Concentration: The 13th Corps Artillery Regiment provided the heavy long-range fire support necessary to cover the gaps between the fortified positions and the canal bridges.Elite Components: The 7th Infantry Division was unique for containing two of Belgium's elite infantry regiments: the 2nd Grenadiers and the 2nd Carabiniers, intended to bolster the defense of the critical Fort Ében-Émael sector.Reinforcement Pipeline: The corps was linked to the 1st Reinforcement and Training Centre , ensuring that combat losses could be replaced by trained personnel from the immediate hinterland, a system modeled on the French mobilization logic.

Post-war service

During the Cold War, it served initially as an army of occupation in Germany and then as part of NATO's Northern Army Group. The corps headquarters was initially established at Yser Caserne, Lüdenscheid, on 15 October 1946. Lieutenant General Jean-Baptiste Piron took command in November 1946. Corps headquarters moved to Haelen Caserne, Junkersdorf, Lindenthal, Cologne, in 1948.
During Exercise Battle Royal in September 1954, the Corps consisted of 1 (BE) Infantry Division and 16 (BE) Armoured Division with 1 Canadian Brigade and 46th Parachute Brigade under command.
The corps' 14th and 20th Artillery Battalions were supported by the 4th U.S. Army Field Artillery Detachment. The detachment was co-located with the Belgian battalions, in quarters across the street from the Belgian Houthulst Kaserne, on Langenwiedenweg Strasse, Werl, West Germany.
In 1960, the 1st and 16th Divisions were transformed into mechanised divisions of the "Landcent" type. That year, 1st Division at Bensberg consisted of:
The 16th Armoured Division consisted of:
In 1966 the Belgian Army's active force was mechanised, and the force was reduced to two active-duty two-brigade divisions. In 1995, the corps merged with the 1st Mechanised Division and Paracommando Brigade to become the "Intervention Force".