Francesco Penna served as a volunteer in the Spanish Civil War in the XXIII Gruppo.

On 12 October, the Republican Air Force intervened heavily to support International battalions and tanks in an attempt to break through the enemy lines at Fuentes del Ebro.
During the day, the VI Gruppo lost a good part of numerical, considering that part of the 31^a Squadriglia had previously been detached to Cordoba. Therefore, immediately the same morning, the Comando dell’Aviazione Legionaria ordered the XXIII Gruppo to transfer to Sanjurio (Zaragoza).
At 10.30, 29 CR.32s led by Maggiore Andrea Zotti, took off from Almaluèz and arrived over Sanjurio around noon. However, before landing, Maggiore Zotti decided to lead his pilots to explore the area between Villafranca and Fuentes del Ebro. Here they spotted four Polikarpov RZ “Natachas” escorted by nine I-16s “Ratas” (above them) and 15 I-15 “Curtiss” (below them). The Italian fighters attacked the Republican aircraft and at the end of the dogfight, that lasted about fifteen minutes, the Italians claimed seven (eleven according to other sources) fighters destroyed for no losses, although several CR.32s were hit and damaged. Combat was very hard for the Italians because their fighters were weighted by pilots’ personal luggage. Pilots that scored, either individually or jointly, were Sergente Giuseppe Mottet (20^a Squadriglia) (1 I-16), Sottotenente Giampiero Del Prete, Capitano Antonio Larsimont Pergameni (CO of the 20^a Squadriglia), Sergente Penna, Sottotenente Aldo Felici, Capitano Enrico Degli Incerti (CO of the 19^a Squadriglia) (1 I-16), Sottotenente Pio Tomaselli (19^a Squadriglia), Franco Lucchini (19^a Squadriglia), Capitano Guido Nobili (CO of the 18^a Squadriglia), Sergente Maggiore Giovanni Carmello (18^a Squadriglia), Sergente Carlo Dentis, Sottotenente Giuseppe Enrico Zuffi, Sergente Federico Tassinari (19^a Squadriglia), Sergente Maggiore Alfonso Mattei and Sottotenente Bruno Trevisan. It seems that Lucchini’s, Tassinari’s and Mattei’s claims was a shared between these three pilots.

Penna served with the 160^o Gruppo during the Greek campaign. The unit was at this time equipped with Fiat CR.42s

At 10.30 on 21 December 1940 80 Squadron took off from Yanina for the front in Greece. They were led by Squadron Leader William Hickey and flew in three sections. The first comprised four aircraft and was led by Hickey, the second of three was led by Flight Lieutenant 'Pat' Pattle and the third trio was led by Flying Officer Sidney Linnard.
Near Argyrokastron three enemy trimotor bombers were seen. They were identified as S.79s, and then three more aircraft with twin tails were seen, recognised in this case as Fiat BR.20s. All six were in fact Cant Z.1007bis aircraft from the 47^o Stormo B.T. from Grottaglie. The Italian bombers were attacked by the Gladiators and Pattle believed that he had hit one.
At this moment however 15 CR.42s of the 160^o Gruppo appeared on the scene. Maggiore Oscar Molinari, the Gruppo commander, was leading these Italian aircraft on an offensive reconnaissance over Yanina, Paramythia and Zitsa. Seeing the bombers under attack by an estimated 20 Gladiators, the Italian attacked, joined by other aircraft from the 150^o Gruppo so that 80 Squadron pilots assessed the number of their opponents at 54!
After 25 minutes the air battle broke up and eight of the British pilots returned to claim eight confirmed and three probables. Pilot Officer ’Bill’ Vale claimed three, one of them in flames. Sergeant Charles Casbolt claimed one, which blew up and another, which spun down (later down-graded to a probable). Sergeant Donald Gregory claimed another two, again one in flames, but his own aircraft was badly shot up and he was wounded in the right eye. He however managed to return to Yanina. Pattle and Flight Sergeant S. A. Richens also claimed one CR.42 each, Pattle reporting that his victim fell in flames, whilst Flying Officers W. B. Price-Owen and F. W. Hosken both claimed probables. However Flying Officer A. D. Ripley in N5854 was seen to be shot down in flames and killed, while Squadron Leader Hickey was spotted bailing out of N5816; sadly his parachute caught fire, and he died from injuries soon after reaching the ground. Greek troops recovered the bodies of both pilots. Flying Officer Sidney Linnard’s aircraft (N5834) was also badly hit and he was hit in the left calf by an explosive bullet and was taken to hospital after landing at Yanina.
In return the 160^o Gruppo pilots claimed six Gladiators, two each by Maggiore Molinari and Tenente Edoardo Crainz (in CR.42 ‘394-7’), and one apiece by Tenente Eber Giudici and Capitano Paolo Arcangeletti. Probables were claimed by Tenente Torquato Testerini, Sergente Maggiore Penna and Sergente Maggiore Domenico Tufano. The 150^o Gruppo pilots claimed two more Gladiators in collaboration, while 47^o Stormo gunners claimed one more and a probable. As in the case of the British fighters, actual Italian losses totalled only two aircraft, Tenente Mario Gaetano Carancini and Tenente Mario Frascadore of the 160^o Gruppo being lost, while Maggiore Molinari was wounded in the right foot and force-landed near Tepelene with a damaged engine.

On 16 March 1941, Sergente Maggiore Desideri and Sergente Maggiore Penna of 160^o Gruppo C.T. flew a night interception in their Fiat CR.42s. During this mission they shot down Wellington R1387 from 37 Squadron, which had attacked Tirana airfield, Albania. Two other aircraft, T2580 and T2895, managed to return to Menidi despite being seriously damaged during this mission.

Penna ended the war with 2 shared biplane victories.

Claims:

Kill no.	Date	Time	Number	Type	Result	Plane type	Serial no.	Locality	Unit
	1937
	12/10/37	10:30-	1	Enemy fighter	Shared destroyed	Fiat CR.32		Villafranca-Fuentes del Ebro	XXIII Gruppo
	1940
	21/12/40		1	Gladiator (a)	Probable	Fiat CR.42		Argyrokastron area	160o Gruppo
	1941
	16/03/41		½	Wellington (b)	Shared destroyed	Fiat CR.42		near Tirana	160o Gruppo

Biplane victories: 2 shared destroyed, 1 probable.
TOTAL: 2 shared destroyed, 1 probable.
(a) In this combat 80 Squadron claimed 8 and 3 probables while the 160^o Gruppo C.T. lost 2 aircraft and 1 one force-landed. Regia Aeronatica claimed 9 and 4 probables while 80 Squadron lost 2 aircraft and 2 damaged.
(b) Wellington R1387 of 37 Squadron shot down.
¨

Sources:
Air war for Yugoslavia, Greece and Crete - Christopher Shores, Brian Cull and Nicola Malizia, 1987 Grub Street, London, ISBN 0-948817-07-0
Ali in Spagna - Giuseppe Federico Ghergo and Angelo Emiliani, kindly provided by Ludovico Slongo
Ali nella tragedia - Giulio Lazzati, 1970 Mursia, Milan, ISBN 88-425-2132-9, kindly provided by Stefano Lazzaro
Aviatori Italiani - Franco Pagliano, 1964 Longanesi Milano, kindly provided by Ludovico Slongo
Aviobrigada X - Alfredo Lagoluso, 2001 no. 97, 98 and 99 of Storia Militare (October-December 2001), kindly provided by Ludovico Slongo
Guerra di Spagna e Aviazione Italiana - Ferdinando Pedriali, 1992 USSMA, Rome, kindly provided by Stefano Lazzaro
Il 23^o Gruppo Caccia - Nicola Malizia, 1974 Bizzarri, Roma, kindly provided by Stefano Lazzaro
La caccia notturna Italiana 1940-1942 - Giancarlo Garello, 1996 Aerofan nr. 57 apr-giu 1996 kindly provided by Jean Michel Cala
Le giovani aquile – Antonio Trizzino, 1972 Longanesi Milano, kindly provided by Stefano Lazzaro
Quelli del Cavallino Rampante - Antonio Duma, 1981 Editore Dell'Ateneo, Roma, kindly provided by Stefano Lazzaro