Army of Alost
Commanded by the Duc de Berry (King Louis XVIII's nephew). Organizing at Ghent.
Garde du Corps (1 squadron)
Grenadiers a Cheval (2 squadrons)
Chasseurs a Cheval du Roi (2 squadrons)
Regiment de la Couronne (2 battalions)
Regiment du Nord (2 battalions
3 gun battery
22 April 1815 had 850 men. 1 June 1815 had 2,100 men. It moved up to Cambrai in June.
Source: The Waterloo Campaign. Albert Nofi. Pennsylvania: Combined Books 1993.