In August 1940 Mannucci belonged to the 75^a Squadriglia of the 23^o Gruppo C.T. based on Sicily and equipped with the Fiat CR.42. The unit at this time took part in the attacks on Malta.

On 24 August, six S.79s of 192^a and 193^a Squadriglia, 87^o Gruppo, 30^o Stormo B.T., led by Tenente Colonello Schiaretta and Capitano Verrascina, again raided Hal Far and Kalafrana, escorted by 17 CR.42s of the 23^o Gruppo. Four Hurricanes of 261 Squadron was once more scrambled led by Flight Lieutenant George Burges (P3731), who attacked three of the bombers. He saw a few bits fly from one of these, which headed for Sicily losing height rapidly. He was then set upon by CR.42s and his aircraft was hit by fire from Tenente Mario Rigatti of the 75^a Squadriglia. Visibility was poor and Burges managed to escape, but on landing, the undercarriage of his Hurricane collapsed (due to combat damage?). Of the British pilots, Flying Officer Frederick Taylor claimed one CR.42 shot down and Pilot Officer Thomas Balmforth a second as a probable. Sergente Maggiore Renzo Bocconi of the 75^a Squadriglia baled out of his stricken CR.42 and was rescued from the sea to become a prisoner of war. Taylor probably shot him down. Tenente Rigatti was also hit after attacking Burges’s Hurricane, returning to Comiso seriously wounded and with his aircraft (MM4382) badly damaged, claiming one British fighter shot down. He was later awarded the Medaglia d’Oro. It seems almost certain that he had been flying the aircraft attacked by Balmforth.
The returning Italian pilots claimed three more victories in this combat. One was claimed by Maresciallo Luigi Pasquetti, one by the shot down Sergente Maggiore Renzo Bocconi and finally one shared between Tenente Ezio Monti and Sergente Mannucci.

On 16 December 1940, the 23^o Gruppo (previously part of 3^o Stormo but now Autonomo) with 20 Fiat CR.42s (70^a, 74^a and 75^a Squadriglie) and three hack Caproni Ca.133s arrived in Tripoli to help trying steam Operation Compass, which was mauling the Italian forces. The Gruppo had experienced brief (and quite unlucky) action at the beginning of the war against France, and then it had moved to Sicily where they had seen extensive action against Malta.
They were led by their CO, Maggiore Tito Falconi (a famous aerobatic pilot that had held the world record in inverted flight going in a Caproni 113 biplane racer from St. Louis to Chicago in 1933 and a veteran of the Abyssinian Campaign where he had gained some ground victories and of the Spanish Civil War where he had claimed many (mostly shared) aerial victories) in a 70^a Squadriglia fighter.
Pilots in the 70^a Squadriglia were Tenente Claudio Solaro (acting CO), Tenente Gino Battaggion, Sottotenente Oscar Abello, Sergente Ubaldo Marziali, Sergente Balilla Albani, Sergente Maggiore Celso Zemella and Sergente Cesare Sironi.
Pilots in the 74^a Squadriglia were Capitano Guido Bobba (CO and already credited with one over Spain and three individual and a probable Hurricanes over Malta, which made him one of the top scoring Italian pilots up to that moment), Tenente Mario Pinna, Sottotenente Sante Schiroli, Sergente Maggiore Raffaele Marzocca, Sergente Emilio Stefani, Sergente Giuseppe Sanguettoli and Sergente Manlio Tarantino.
Pilots in the 75^a Squadriglia were Tenente Pietro Calistri (CO), Tenente Ezio Maria Monti, Sottotenente Giuseppe De Angelis, Sottotenente Renato Villa, Maresciallo Giovanni Carmello and Maresciallo Carlo Dentis.
The pilots in the Ca.133s were Tenente Marino Commissoli, Sergente Pardino Pardini (70^a Squadriglia), Tenente Lorenzo Lorenzoni (74^a Squadriglia), Tenente Milano Pausi, Sottotenente Leopoldo Marangoni (brother in law of Maggiore Carlo Romagnoli) and Sergente Mannucci (75^a Squadriglia)).
The Gruppo landed at Tripoli-Castel Benito at 17:15. Celso Zemella’s fighter was left behind at Pantelleria after an engine breakdown.

On 19 December, the 23^o Gruppo moved to Z1 landing ground at Ain el Gazala.

The last Italian bombing mission of the day on 27 December was again against Sollum. Four SM 79s from the 41^o Stormo under Tenente Colonnello D’Ippolito and four bombers from the 216^a Squadriglia, 34^o Stormo, led by Tenente Romanini took off from Tmini at 14:30.
They were escorted by fighters from the 23^o Gruppo and 10^o Gruppi. Maggiore Tito Falconi was at the head of the formation of the first unit, which also included Tenente Claudio Solaro, Sottotenente Oscar Abello and Sergente Ubaldo Marziali from the 70^a Squadriglia, Tenente Mario Pinna, Sottotenente Milano Pausi and Sergente Giuseppe Sanguettoli from the 74^a Squadriglia and Tenente Pietro Calistri, Tenente Ezio Maria Monti, Maresciallo Giovanni Carmello, Sergente Mannucci and Sottotenente Leopoldo Marangoni from the 75^a Squadriglia.
It seems that the bomber formation split and the 41^o Stormo attacked British mechanized units in Halfaya and Gabr Bu Fares under heavy AA that damaged, although slightly, all the aircraft. The SM 79s of the 34^o Stormo attacked ships in Sollum harbour and were intercepted by many Hurricanes. The SM 79s were totally unable to defend themselves because of icing on all the guns and one of them was shot down. This was Sottotenente Aldo Peterlini’s bomber and Peterlini was killed together with three of his crew (Sergente Maggiore Arturo Scagnetti (second pilot), Aviere Scelto Motorista Alcide Frizzera and Aviere Scelto Radiotelegrafista Gioacchino Scuderi). The other two members of the crew (Primo Aviere Armiere Ciancilla and Primo Aviere Montatore Fiore) where able to bale out. Tenente Pandolfi’s aircraft was riddled by enemy bullets (probably RD) while the other two SM 79s were less seriously damaged although suffering some wounded among their crews.
They had been intercepted by 33 Squadron which claimed three SM 79s and one probable and probably two CR.42s during offensive patrols performed by pairs of Hurricanes over Sollum. They also claimed one SM 79 and one CR.42 damaged. Vernon Woodward claimed one of the probable CR.42s and the damaged CR.42.
Falconi’s pilots recorded combat with many Hurricanes, one of which was claimed as probable by the 70^a Squadriglia and six more were damaged. Tenente Solaro and Sottotenente Abello returned with damaged fighters. Solaro had been hit by AA fire and Sottotenente Abello by British fighters. Calistri and his men claimed a shared Hurricane and four more damaged. They landed back at 16:55. A shot down Hurricane was also recorded by the 74^a Squadriglia, which also recorded a SM 79 shot down by AA fire.
The CR.42 escort from the 10^o Gruppo was composed of seven fighters from the 90^a Squadriglia (Tenente Giovanni Guiducci, Tenente Franco Lucchini, Sottotenente Alessandro Rusconi, Sottotenente Neri De Benedetti, Sergente Alfredo Sclavo, Sergente Bruno Bortoletti and Sergente Enrico Botti), six from the 84^a Squadriglia (Capitano Luigi Monti, Tenente Antonio Angeloni, Sottotenente Bruno Devoto, Sergente Maggiore Salvatore Mechelli, Sergente Domenico Santonocito and Sergente Piero Buttazzi) and six from the 91^a Squadriglia (Maggiore Carlo Romagnoli, Capitano Vincenzo Vanni, Sottotenente Andrea Dalla Pasqua, Sottotenente Orlando Mandolini, Sottotenente Ennio Grifoni and Sergente Elio Miotto). Tenente Guiducci reported that the heavy AA immediately hit one of the SM 79s, which was shot down. Then five monoplanes (Hurricanes and Spitfires(!)) tried to attack but were immediately counterattacked and one of them was shot down. Later, another attempt by a lone British fighter failed after the intervention of the Italian escort. The 90^a Squadriglia pilots expanded 320 rounds of ammunition and it seems that in the end the victory was assigned to the whole formation as a Gruppo victory. It seems that it was the same aircraft claimed independently by the two Squadriglie of the 23^o Gruppo.

At 15:00 on 3 January 1941, Maggiore Tito Falconi led four CR.42s of the 70^a Squadriglia (Tenente Claudio Solaro, Tenente Gino Battaggion, Sergente Maggiore Balilla Albani and Sergente Cesare Sironi), five of the 74^a Squadriglia (Tenente Mario Pinna, Tenente Lorenzo Lorenzoni, Sottotenente Sante Schiroli, Sergente Maggiore Raffaele Marzocca and Sergente Giuseppe Sanguettoli) and seven of the 75^a Squadriglia (Tenente Pietro Calistri, Tenente Ezio Maria Monti, Sottotenente Giuseppe De Angelis, Sottotenente Renato Villa, Maresciallo Giovanni Carmello, Maresciallo Luigi Pasquetti and Sergente Mannucci) in an escort mission for SM 79s attacking mechanized vehicles around Bardia. Fighters from the 10^o Gruppo were also present including Sottotenente Bruno Devoto, Sergente Mario Veronesi, Sergente Piero Buttazzi and Sergente Luciano Perdoni of the 84^a Squadriglia and Sottotenente Neri De Benedetti, Sottotenente Orlando Mandolini, Sergente Luigi Contarini and Sergente Alfredo Sclavo of the 90^a Squadriglia. Hurricanes were intercepted and two of them were claimed damaged by the 70^a Squadriglia’s pilots. During the return journey, the CR.42s went down to strafe, claiming three armoured vehicles.
They landed back at 17:20.

Mannucci ended the war with 2 shared biplane victories.

Claims:

Kill no.	Date	Time	Number	Type	Result	Plane type	Serial no.	Locality	Unit
	1940
	24/08/40		½	Hurricane (a)	Shared destroyed	Fiat CR.42		Malta	75a Squadriglia
	27/12/40	14:30-16:55	1/5	Hurricane (b)	Shared destroyed	Fiat CR.42		Sollum area	75a Squadriglia
	27/12/40	14:30-16:55	1/5	Hurricane (b)	Shared damaged	Fiat CR.42		Sollum area	75a Squadriglia
	27/12/40	14:30-16:55	1/5	Hurricane (b)	Shared damaged	Fiat CR.42		Sollum area	75a Squadriglia
	27/12/40	14:30-16:55	1/5	Hurricane (b)	Shared damaged	Fiat CR.42		Sollum area	75a Squadriglia
	27/12/40	14:30-16:55	1/5	Hurricane (b)	Shared damaged	Fiat CR.42		Sollum area	75a Squadriglia

Biplane victories: 2 shared destroyed, 4 shared damaged.
TOTAL: 2 shared destroyed, 4 shared damaged.
(a) 75^a Squadriglia claimed four aircraft in this combat but 261 Squadron only got one damaged.
(b) Claimed in combat with Hurricanes from 33 Squadron, which claimed two probable CR.42s and one damaged without losses. The 10^o and 23^o Gruppi claimed 3 Hurricanes and 1 probably shot down with another 10 damaged while suffering 3 damaged CR.42s.

Sources:
3^o Stormo, storia fotografica - Dai biplani agli aviogetti - C. Lucchini and E. Leproni, 1990 Gino Rossato Editore kindly provided by Jean Michel Cala with translations kindly provided by Birgitta Hallberg-Lombardi
Desert Prelude: Early clashes June-November 1940 - Håkan Gustavsson and Ludovico Slongo, 2010 MMP books, ISBN 978-83-89450-52-4
Desert Prelude: Operation Compass - Håkan Gustavsson and Ludovico Slongo, 2011 MMP books, ISBN 978-83-61421-18-4
Malta: The Hurricane Years 1940-41 - Christopher Shores and Brian Cull with Nicola Malizia, 1987 Grub Street, London, ISBN 0-89747-207-1