Cattaneo was born in
Sant'Anastasia,
Naples, in 1883, and after attending the Naples Military College he entered the
Italian Naval Academy at
Livorno in 1902; he graduated in 1906, becoming an
ensign. He joined the crew of the
battleship Ammiraglio di Saint Bon, with which he took part in the rescue operations after the
1908 Messina earthquake. After becoming a
sub-lieutenant, he served on the battleship
Regina Elena. He took part in the
Italo-Turkish War as commanding officer of a landing party which participated in the
occupation of Tripoli; for this action, he was awarded a
Silver Medal of Military Valor. In 1913 he was promoted to
lieutenant, and during
World War I he commanded the
torpedo boat Orsa, which served intensely in the southern
Adriatic Sea, gaining a
Bronze Medal of Military Valor in July 1915, and later he served on board
destroyers, including
Carabiniere. In 1919 he was awarded a second Silver Medal. In January 1920, he was appointed Naval Attaché in
Constantinople and later in the same year he was promoted to
lieutenant commander. In 1929, he served at the Ministry of the Navy, and later he was promoted to
commander and appointed Naval Attaché first in
Romania and later in
Jugoslavia. In 1932, he was promoted
captain, commanding, between December 1933 and April 1935, the light cruiser
Di Giussano. In 1937 he became
rear admiral (
Contrammiraglio) and in March 1938 he was promoted
vice admiral (
Ammiraglio di divisione). ==World War II==