Mario Daverio was born on 11 December 1908 and was from Cameri (Novara).

In June 1940, Sottotenente Daverio served in the 363^a Squadriglia, 150^o Gruppo C.T. This unit was at the time equipped with Fiat CR.42s.

On 15 June 1940, the Italian Headquarters ordered the 150^o, 18^o and 23^o Gruppi C.T. to attack the French airfields in Le Cannet des Maures (2km south-east of Le Luc) and Cuers Pierrefeu (close to the naval base of Toulon), in Provence, with the purpose of destroying and disrupting the French fighter force on the ground.
Le Cannet des Maures was the base of the GC III/6, which had arrived there on 3 June with its Morane Saulnier MS.406 fighters and was in the midst of converting from that type to the new Dewoitine D.520 (on 15 June 1940 the groupe had at least 13 D.520s on hand). The airfield of Cuers Pierrefeu was the base of the escadrille de chasse AC 3 of the Aéronautique Navale, equipped with eleven Bloch 151 fighters, and the escadrille de bombardement en piqué AB 3 of the Aéronautique Navale, equipped with eleven Vought 156 dive-bombers.
At noon, 25 CR.42s from the 23^o Gruppo departed from Cervere (a small town in Piedmont near the French border) to attack Le Cannet Des Maures airfield. The first group, under the command of Maggiore Tito Falconi (CO of the 23^o Gruppo in a CR.42 from the 70^a Squadriglia) was to make the strafing attack. The group was composed of Capitano Luigi Filippi (CO of the 75^a Squadriglia), Tenente Mario Rigatti, Tenente Calogero Mazza, Sottotenente Malvezzi, Maresciallo Luigi Pasquetti, Sergente Maggiore Renzo Borro, Sergente Maggiore Davini, Sergente Maggiore Germano Gasperoni (all from the 75^a Squadriglia), Capitano Guido Bobba (CO of the 74^a Squadriglia), Sergente Maggiore Arnaldo Sala and Sottotenente Domenico Tessera (all from the 74^a Squadriglia). The rest of the formation, with fighters from all three Squadriglie, was to act as top cover. This formation was composed of Capitano Ottorino Fargnoli (CO of the 70^a Squadriglia), Tenente Claudio Solaro (70^a Squadriglia), Sottotenente Oscar Abello (70^a Squadriglia), Tenente Ezio Monti (75^a Squadriglia), Sergente Maggiore Balilla Albani (70^a Squadriglia), Sergente Carlo Scarselli (70^a Squadriglia), Sergente Maggiore Celso Zemella (70^a Squadriglia), Tenente Lorenzo Viale (74^a Squadriglia), Tenente Mario Benedetti (74^a Squadriglia), Tenente Mario Pinna (74^a Squadriglia), Sergente Maggiore Renzo Bocconi (74^a Squadriglia), Sergente Raffaele Marzocca (74^a Squadriglia) and Sergente Emilio Stefani (74^a Squadriglia).
They arrived over the target at 13:00 and attacked under heavy AA-fire. They claimed to have hit fifteen “Curtis” fighters and four old bombers that lay on the sides of the airstrip, in particular Capitano Bobba claimed hits on three aircraft as did Sottotenente Tessera while Sergente Sala claimed to have hit two aircraft on the ground (it seems that at least three D.520s were destroyed when Dewoitine D.520 nos. 257, 294 and 304 of GC III/6 went up in flames).
During the strafing a number of French fighters identified as “four or five Morrane” or alternatively “Dewoitine” engaged the strafing Fiats. Capitano Filippi (MM4361), was shot down by Adjutant Pierre Le Gloan of GC III/6. Filippi baled out and was captured. Maresciallo Pasquetti claimed a “Morane” but was also hit, wounded (reportedly by AA fire but possibly by Le Gloan) and returned to Cervere despite large problems. He was later decorated with the Medaglia d’argento al valor militare in the field for this mission. Tenente Rigatti’s and Sottotenente Malvezzi’s fighters were also damaged (reportedly by AA). Among the pilots of the covering patrol, Sergente Stefani claimed a “Morrane”, Tenente Benedetti a probable “Morrane” and Sergente Marzocca a damaged “Morrane”. The pilots of the 70^a Squadriglia reported an indecisive engagement with no losses caused or suffered and finally Tenente Viale had his fighter seriously damaged by an explosive bullet that hit the junction between the lower wing and the fuselage. Back at base the plane was declared RD (Riparabile in Ditta - Repairable but only in the manufacturer’s workshop) and sent to the Aeritalia-Fiat workshops in Turin.
The pilots of the 23^o Gruppo observed that despite hits on aircraft on the ground they hadn’t burnt. This was found to have been caused by a defective batch of incendiary ammunition.
The formation from the 150^o Gruppo departed from Villanova D’Albenga (in Liguria near the sea) at 12:00 and was composed of 27 Fiat CR.42s divided in three groups. Their target was the airfield of Cuers Pierrefeu, and they arrived there at 13:00. A first group of eight aircraft commanded by Capitano Giorgio Graffer (CO of the 365^a Squadriglia) and composed of Tenente Franco Gatti, Sottotenente Lorenzo Clerici, Maresciallo Felice Sozzi, Maresciallo Virginio Bodini, Sergente Maggiore Guido Fibbia, Sergente Maggiore Felice Squassoni and Sergente Bruno Zotti (all from the 365^a Squadriglia) attacked the airfield of Cuers itself. A second group of nine fighters from the 363^a Squadriglia led by the Gruppo CO Tenente Colonnello Rolando Pratelli (Capitano Luigi Mariotti (Squadriglia CO), Tenente Pietro Garfagnoli, Sottotenente Daverio, Maresciallo Giuseppe Salvadori, Sergente Maggiore Natale Viola, Sergente Maggiore Bruno Benassi, Sergente Paolo Rossi, Sergente Antonio Lazzari) and a third group of eight aircraft from the 364^a Squadriglia under command of the 53^o Stormo commander Colonnello Arrigo Tessari (Capitano Nicola Magaldi (Squadriglia CO), Capitano Nino Caselli, Tenente Giuseppe Enrico Zuffi, Tenente Alberto Spigaglia, Maresciallo Delfino Fratini, Maresciallo Ugo Guidi, Sergente Maggiore Virgilio Pongiluppi, Sergente Giovanni Negri and Sergente Achille Pacini) covered Graffer and his men during the strafing attack.
The covering group led by Colonnello Tessari engaged six French fighters, while Graffer’s group, after four or five strafing passes enter combat against “Morane fighters” while regaining height. All in all, four Morane were claimed shot down (all Bloch 151s from AC 3 and confirmed with French records) and 15 “Moranes” were claimed on ground (in fact at least six Vought 156s of AB 3 were destroyed). The victories were credited as “shared” to all the pilots of the Gruppo.
The aircraft of Capitano Nino Caselli (MM5579) and Tenente Zuffi of the 364^a Squadriglia (MM5590) were lost. Caselli’s Fiat was shot down by French fighters and he was killed, while Zuffi landed on Cuers Pierrefeu undamaged due to a breakdown of the throttle. Zuffi was taken prisoner and his undamaged fighter was taken by the French (the only aircraft captured by the Aéronautique Navale), which in the following days painted it with French colours and duly photographed this trophy with pilots posing near it. After the war the Italians had to do great efforts with the Vichy Authorities to finally have back the fighter in August. Additionally, the Fiats of Graffer and Clerici were damaged by French fighters during the dogfight.
Finally, 15 Fiat CR.42s the 18^o Gruppo took off from Villanova D’Albenga immediately after the 150^o Gruppo. They patrolled along the direction of Cuers Pierrefeu - Cannet des Maures - Hyères (the latter an airfield 13 km east of Toulon) to prevent any interference from the French fighter force. Led by the 18^o Gruppo’s CO Maggiore Ferruccio Vosilla the formation was composed by Capitano Giulio Anelli (CO of the 85^a Squadriglia), Tenente Giulio Cesare Giuntella and Sergente Maggiore Giuseppe Ruzzin of the 85^a Squadriglia, Capitano Gino Lodi (CO of 95^a Squadriglia), Sottotenente Eugenio Salvi, Maresciallo Felice Longhi, Maresciallo Giovanni Ferrari and Sergente Maggiore Giacomo Grillo of the 95^a Squadriglia (Vosilla flew with Salvi and Longhi as wingmen) and finally the 3^o Stormo Commander Colonnello Fortunato Rolando in a 83^a Squadriglia fighter with Maresciallo Francesco Colombo and Sergente Maggiore Evdo Formentini as wingmen together with Capitano Edoardo Molinari (CO of 83^a Squadriglia), Sottotenente Carlo Lolli and Maresciallo Gaetano Bortolini.
At a height of 5500 meters over Beau Champ they were intercepted by enemy fighters, which suddenly appeared from a cloud bank. They were identified as “Morane 406 plus another type not sure” and in the ensuing combat three of them were claimed shot down plus four others hit without being able of ascertain the damage inflicted (these claims can’t be verified with French sources). It seems that no individual credit was given for these victories that went as shared to all the fifteen pilots participating in the mission. During the combat, two aircraft of the 83^a Squadriglia were lost when Sergente Maggiore Formentini (MM4449) and Maresciallo Colombo (MM4366) both were shot down and killed (both were probably shot down by Le Gloan and Assolant of GC III/6, which had attacked the “vic” of the Stormo commander). All the fighters of the 85^a Squadriglia suffered gun-jams and were forced to flee, Capitano Anelli, in particular, had to escaped into clouds to get away from enemy fighters, got lost and was obliged to force-land at Dorniella near Grosseto in Tuscany where his plane (MM4372) broke the landing gear and was heavily damaged (RD). Finally, Maresciallo Gaetano Bortolini’s Fiat was hit by a cannon shell that opened a hole of 60 centimetres in the upper wing. Later during the day two more fighters were heavily damaged (RD) on landing back in Villanova D’Albenga returning from scrambles because of the bad conditions of the ground flooded by heavy rain but this was not connected with the above-described combat.
The French reported that in the early hours of 15 June bad wheatear halted flight activities, then, at mid morning, it cleared up. At 10:00, a patrouille composed by Adjutant Diaz, Sergent Pimont and Sous-Lieutenant Stage took-off to cover the reconnaissance mission of a Potez 63. The mission was completed successfully.
At 11:40, the fighter control centre of Toulon signalled big formations of heavy fighters and bombers passing the border and heading south-west. Five minutes later a patrouille simple (three planes group) of Dewoitine D.520s (Adjutant Pierre Le Gloan, Capitaine Jacobi and Capitaine Assolant) of the 5th escadrille of groupe de chasse III/6 (GC III/6) took-off.
The patrouille made for Saint Raphael (on the coast, near the Italian border), where a group of fifteen enemy planes was signalled. Four minutes later (11:49), a second patrouille simple (Capitaine Guerrier, Adjutant Japiot, Sous-Lieutenant Capdeviolle), this time of the 6th escadrille, took off to help the first. However, it took off to late and didn’t participate in the combat.
After arriving over Saint Raphael, the patrouille of Le Gloan received by radio the order of going over Saint Tropez (around 30km south-west). At the same time, Capitaine Jacobi was forced to turn back with engine problems.
Le Gloan saw a formation of twelve Fiat CR.42s in the direction of Saint Tropez heading south-west. He reached them rapidly and attacked at 12:00. In a brief combat, Le Gloan and Assolant claimed two shared aircraft shot down. These were the last two aircraft of the Italian formation and one of the Italian fighters (Maresciallo Colombo of the 83^a Squadriglia) was seen to go down in flames near Beauvallon (4km south of Grimaud) while the other went down in flames near Ramatuelle; the pilot was seen to bale out (probably Sergente Maggiore Evdo Formentini of the 83^a Squadriglia).
At this moment the two pilots of the patrouille were split up. Le Gloan turned over Saint-Tropez and lost contact with the enemy while Capitaine Assolant attacked a third Italian fighter (perhaps Maresciallo Bortolini of the 83^a Squadriglia), but his guns ceased to fire and he had to disengage coming back to Le Cannet des Maures.
Adjutant Le Gloan in the meantime, saw anti-aircraft fire in the direction of Hyères airfield (being over Saint Tropez this direction is quite close to the direction of Toulon-Cuers Pierrefeu that was under attack at that moment). Le Gloan flew in that direction and discovered a group of three Fiat CR.42s heading east. He attacked the right hand Fiat of the group and saw that after the first burst of fire it went down near Saint-Am e, in the bay of Pampalonne. This claim is not confirmed with Italian records but perhaps claimed in combat with an aircraft from 150^o Gruppo returning from the attack on Cuers or alternatively against stragglers of the 18^o Gruppo formation. He was then attacked by eight Italian fighters, and he disengaged by diving away.
At the same time (around 12:15), he received by radio the order of coming back to Le Cannet des Maures which was under attack. He obeyed immediately, arriving over his airfield while the Italians were strafing it. He dived on a couple of fighters and with a single burst of cannon fire he shot down one of them (Capitano Filippi). This plane went down near the farm of the Thermes, just 1km from the airfield of Le Cannet. Continuing his patrol Le Gloan saw a Fiat BR.20 bomber flying a reconnaissance mission over Le Cannet des Maures, probably with the aim of checking the damage inflicted to the airfield. Le Gloan attacked it and, even with no more cannon ammunitions left, shot it down with five passes of his remaining four guns. The bomber fell down near the farm of the Moulin Rouge. This was Fiat BR.20 MM21873 of the 172^a Squadriglia Ricognizione Strategica, which in fact went down over Le Luc. Two of the crew were killed; Aviere scelto motorista Giovanni Bonanno and Aviere scelto fotografo Egisto Di Croce. The rest of the crew were taken POWs; Maggiore Mario Salvadori (an intelligence Officer from the Air force HQ aboard as a passenger), Capitano Giorgio Parodi (the Squadriglia’s CO) and Aviere scelto armiere Attilio Imparato. Bonanno was posthumously decorated with the Medaglia d Oro al valor militare for this action because he helped his commander, who was wounded, to jump out of the falling plane, but after that he was unable to jump himself and died in the subsequent crash.
At Cuers Pierrefeu (attacked by the 150^o Gruppo), the French reported that the Italian fighters attacked the parked Voughts of AB 3 and destroyed six of them. A section of three fighters of AC 3 had taken took off just minutes before the Italian attack. It was commanded by the Enseigne de Vaisseau Carmeille and included Second-Maitres Saint Vanne and Heff. The section had to patrol between Le Luc en Provence and St Raphael. Near the first locality it became involved in combat with 15 Italian fighters (possibly the 18^o Gruppo). The section didn’t claim anything and didn’t suffer any losses even if, later, it was credited with two shared Italian fighters shot down. After this combat, the three pilots went on patrolling over Toulon.
Two other sections of AC 3 took off while the Italians arrived over Cuers. The section commanded by the Lieutenant de Vaisseau Ziegler (CO AC 3) was composed by the Second-Maitres Miramont and Briet. Gaining altitude over Cuers the section was attacked by the Italian fighters. Ziegler had his Bloch 151 (numbered AC3.1, serial number 77) seriously damaged and wounded, he was forced to crash-land at base with his left landing gear cut in half. Briet was rapidly in difficulties under the attack of the numerically superior Italians, with the ailerons damaged and the reservoir holed he disengaged, rejoining the first section over Toulon. Miramont engaged combat north-east of the airfield, over the hills of Hyères. His Bloch 151 (numbered AC3.3, serial number 69) was seriously damaged, but in the heat of the fight, he found himself 50 meters behind a Fiat CR.42 (Capitano Nino Caselli) and with a single burst of his four MAC guns he shot it down. Miramont was not able to continue the fight after this and had to land at Hyères.
The third section of AC 3 suffered worst. It was commanded by the Adjutant Chef Hourcade (a pilot of the Armée de l’Air attached to the Aéronautique Navale since 1939) (Bloch 151 AC3.15 serial 51) and included Soulimont (Bloch 151 AC3.8 serial 348) and Second-Maitre Le Bihan (Bloch 151 AC3.9 serial 37). A few second after the take-off, Hourcade was shot down and killed by the marauding Fiats; Soulimont engaged the Italians but was immediately put out of action and obliged to force-land with his aircraft riddled with bullets. Le Bihan received a burst of fire in the engine and five minutes after took-off had to land in the narrow of Rocbaron. Unfortunately, his plane hit a tree and burst into flames hitting the ground. He succeeded in extricate himself from the burning wreck but died five hours later at the hospital. Some time later Le Bihan was credited with an aerial victory obtained by collision, but looking in the initial reports of this combat there is no trace of this victory.
It is interesting to note that all of Le Gloan’s claims were homologated by the CO of the Zone D’Opérations Aériennes Alpes (ZOAA). (“L’homologation” was the definitive confirmation of an aerial victory corroborated by evidence, was a recognition quite difficult to obtain in the French Air Force). The victories were credited as follows:
Fiat CR.42 individual, Ramatuelle.
Fiat CR.42 shared with Assolant, Saint-Amé Bay of Pampelonne.
Fiat CR.42 individual, Beauvallon.
Fiat CR.42 individual , ferme des Termes near Le Luc.
Fiat BR.20, ferme du Moulin-Rouge near Vidauban.
That is not in complete accordance with the reconstruction above. It is also interesting to note that the victories claimed by AC 3 were apparently not homologated.

It seems that he was posted to the 97^o Gruppo BaT flying Ju 87s in the 239^a Squadriglia.

The 239^a Squadriglia arrived in North Africa on 7 May 1941 and initially operated as an Autonomo unit until the arrival of the 209^a Squadriglia.

The 239^a Squadriglia undertook their first operational sortie on 25 May when Capitano Giuseppe Cenni led seven Ju 87 Rs, escorted by eight CR.42s from the 18^o Gruppo in an attack on transport vessels off the coast near Marsa Luch. They claimed to have sunk one vessel at about 4,000 tons. They had in fact sent down the 3,741-ton Helka and damaged the sloop HMS Grimsby. More Ju 87s from I./StG 1 finished off the latter vessel later in the evening, but in doing so lost Ju 87 R-2/Trop WNr. 6069 to AA defences north-east of Tobruk with Oberfähnrich Hans Winner and Gefreiter Friedrich Lein both being KiA.

On 8 June 1941, the Ju 87 flown by Sottotenente Daverio was shot down by AA over Tobruk with both Daverio and his gunner 1^a Avieri Italo Masi being KiA.

At the time of his death, Daverio was credited with 4 shared biplane victories.

Claims:

Kill no.	Date	Time	Number	Type	Result	Plane type	Serial no.	Locality	Unit
	1940
	15/06/40	13:00-	1	”Morane” (a)	Shared destroyed	Fiat CR.42		Cuers area	363a Squadriglia
	15/06/40	13:00-	1	”Morane” (a)	Shared destroyed	Fiat CR.42		Cuers area	363a Squadriglia
	15/06/40	13:00-	1	”Morane” (a)	Shared destroyed	Fiat CR.42		Cuers area	363a Squadriglia
	15/06/40	13:00-	1	”Morane” (a)	Shared destroyed	Fiat CR.42		Cuers area	363a Squadriglia

Biplane victories: 4 shared destroyed.
TOTAL: 4 shared destroyed.
(a) Claimed in combat with Bloch 151s from AC 3, which lost four aircraft and got two damaged.

Sources:
A History of the Mediterranean Air War 1940-1945: Volume One – Christopher Shores and Giovanni Massimello with Russell Guest, 2012 Grub Street, London, ISBN 978-1908117076
Elenco Nominativo dei Militari dell’ A. M. Decorati al V. M. Durante it Periodo 1929 - 1945 1 Volume A - L
L’Aéronautique navale francaise de septembre 1939 à juin 1940 (Hors série Avions nr.1) - Lucien Morareau, January 1994 Le La Presse, Boulogne sur Mer, kindly provided by Ludovico Slongo
La campagne de France, les combars franco-italiens 10 juin-25 juin (Batailles Aeriennes nr. 11) - Matthieu Comas, January 2000 Le La Presse, Boulogne sur Mer, kindly provided by Ludovico Slongo
Additional information kindly provided by Ludovico Slongo.