Career
In the years before World War I, Dossin served in various positions in the École de guerre and in an advisory capacity in the Ministry of War. In 1913, he was given command of the 18th Mixed Brigade and in 1914 given command of the 2nd Division of the Army, playing a notable part during the retreat from Antwerp and in the Battle of the Yser. Between 1915 and 1919, he served a Military envoy of the Belgian government in exile (of Charles de Broqueville) in Le Havre.
He finished his career as Lieutenant-general.