In 1916, Leone was seconded to serve as brigade major in the 3rd Australian Infantry Brigade of the 1st Australian Division after it was redeployed from Gallipoli to the Somme.
Pada tahun 1916, Leone disokong untuk berdinas sebagai mayor brigadir di Brigade Infantri III Australia dari Divisi I Australia setelah disebarkan kembali dari Gallipoli ke Somme.