D'Havet was released from captivity at the end of 1944 and returned to Italy on 26 December of the same year, leaving active service in the Army from March 1, 1945; he then settled in Rome. On 1 July 1947 he received honorary promotion to Lieutenant General, and in 1954 he published an essay about mountain artillery and Alpine engineers. He died in his home on April 21, 1966, at the age of 78.
