Hazon entered the Military School on 5 November 1904 and graduated as second lieutenant on 14 September 1906.

He began his service within 6th Alpini Regiment, with which he fought in Libya during the Italo-Turkish War.

He was later transferred to the Rome Legion and participated in the First World War with the rank of lieutenant and later captain.

On 17 December 1934, after promotion to colonel, he was appointed Inspector of the IV Zone (Rome).

After the first wave of bombers had dropped its bombs, Hazon rushed towards the San Lorenzo district, which had suffered the heaviest damage, along with his chief of staff, Colonel Ulderico Barengo, to co-ordinate rescue efforts; they were caught en route by the incoming second wave and a bomb exploded near their car, killing both.