In military terms it is a Permit or license given to those who provide mandatory military service. It is granted as a rest and is used to visit the family. It is used as a prize for good behavior.
Leave on leave, free from the obligations of service, especially military.
In military terms, leaving franco means exit break or day off outside the barracks. It is a permission that is granted to the military to leave the premises where they are stationed to visit his family.