Giovanni Giannini was from Foggia.

In November 1940, Tenente Giannini served in the 154^a Squadriglia, 3^o Gruppo Autonomo C.T., which was equipped with Fiat CR.42s.

At around midday on 27 November, the British and Italian fleets clashed in what was later called the Battle of Cape Spartivento. Eleven Swordfishes from 810 Squadron of HMS Ark Royal led by Lieutenant Commander M. Johnstone attacked at around 12:40, claiming a hit on the battleship Vittorio Veneto (in fact, they all missed).
In the early afternoon, nine Swordfishes from 820 Squadron of HMS Ark Royal led by Lieutenant Commander J. A. Stuart-Moore attacked the Italian cruisers, claiming two hits (none achieved). Three CR.42s of 154^a Squadriglia piloted by Capitano Tovazzi, Tenente Giannini and Sergente Maggiore Bortolani intercepted a British plane identified as a Blackburn during a cruise over the Italian fleet and Giannini claimed it shot down. Ten SM 79s of the 32^o Stormo, escorted by CR.42s of the 3^o Gruppo Autonomo then arrived over Force H and seven Fulmars of 808 Squadron, which were up, intercepted at 14:30 claiming two or three victories without being able to stop them. Green Section’s Lieutenant Rupert Tillard claimed one SM 79 shot down but then he and the men of his section were bounced by the CR.42s. A formation of five CR.42s of the 153^a Squadriglia led by Capitano Giorgio Tugnoli and including Tenente Alfonso Mattei, Sottotenente Cesare Ciapetti (154^a Squadriglia), Sergente Maggiore Visconti and Sergente Lucato (154^a Squadriglia) reported a combat against seven British fighters probably Hurricanes over the sea 200 km south-west of Cagliari. They claimed five victories with the use of 1080 rounds, one of the victories was claimed individually by Ciapetti while Lucato failed to return. In fact, unable to fight back because low on ammunitions and after having mistaken the Fiats for Sea Gladiators, Fulmar N1941 (pilot Sub Lieutenant Richard Maurice Scott Martin and TAG L/A Alexander Laird Milne Noble (FAA/FX 79397)) was shot down into the sea with the loss of the crew. The FAA pilots were unable to claim anything and the missing CR.42 probably run out of fuel after the combat and disappeared in the sea with its pilot.
All the SM 79s from the 32^o Stormo returned to base, even if eight out of ten were damaged by the Fulmars and the AA, two of them seriously. However, a transit Vichy French Farman 223 was involved in the combat and shot down, most likely by the Fulmars.
One hour later, seven Skuas of 800 Squadron led by Lieutenant Richard Smeeton dive bombed the Italian ships without success but while coming back to HMS Ark Royal they run across the Ro.43 seaplane spotter of Vittorio Veneto (piloted by Capitano Violante with observer Sottotenente di Vascello Davide Sovrano). Four of the Skuas shot it down into the sea (Lieutenant Rooper/Sub Lieutenant Woolston in L3015, Petty Officer (A) Bert Sabey/L/A Cooles in L2900, Petty Officer (A) Burston/N/A Holmes in L3007 and Petty Officer (A) Jopling/N/A Glen in L3017).

Giannini ended the war with 1 biplane victory.

Claims:

Kill no.	Date	Time	Number	Type	Result	Plane type	Serial no.	Locality	Unit
	1940
1	27/11/40	p.m.	1	Blackburn	Destroyed	Fiat CR.42		Cape Spartivento area	154a Squadriglia

Biplane victories: 1 destroyed.
TOTAL: 1 destroyed.

Sources:
3^o Stormo, storia fotografica - Dai biplani agli aviogetti - Carlo Lucchini and Leproni Enrico, 1990 Gino Rossato Editore
Assi Italiani Della Caccia 1936-1945 - 1999 Aerofan no. 69 apr.-giu. 1999
Diario Storico 153^a Squadriglia anno 1940.
Diario Storico 154^a Squadriglia anno 1940.
Elenco Nominativo dei Militari dell’ A. M. Decorati al V. M. Durante it Periodo 1929 - 1945 1 Volume A - L
Malta: The Hurricane Years 1940-41 - Christopher Shores and Brian Cull with Nicola Malizia, 1987 Grub Street, London, ISBN 0-89747-207-1
Additional information kindly provided by Giovanni Massimello and Ludovico Slongo.