Tolmino Zanarini was from Bologna.

On the last day of August 1940, the 151^o Gruppo C.T. (366^a, 367^a and 368^a Squadriglie) was ordered to move in Libya with 30 CR.42s as a reinforcement for the attack against Sidi Barrani.
The unit under the command of Maggiore Carlo Calosso was one of the first equipped with CR.42s in 1939 and was based in Caselle Torinese near Turin, with sections and Squadriglie detached in different airbases of North Italy for local defence duties.
They departed Caselle Torinese in the morning of 6 September and at 18:20 on 8 September, the whole Gruppo landed in Tripoli Castel Benito.
The 366^a Squadriglia formation was composed of ten aircraft: Capitano Bernardino Serafini (CO), Tenente Mario Ferrero (the Gruppo Adjutant), Sottotenente Amedeo Guidi, Maresciallo Giulio Cesare, Sergente Maggiore Fiorenzo Milella, Sergente Maggiore Dino Carta, Sergente Maggiore Roberto Marchi, Sergente Maggiore Cesare Chiarmetta, Sergente Antonio Camerini, Sergente Eugenio Cicognani. Tenente Piero Veneziani and Maresciallo Giovanni Accorsi followed in the unit’s hack Caproni Ca.133 together with five ground personnel.
The formation of 367^a Squadriglia comprised the Gruppo Commander Maggiore Carlo Calosso, the 368^a Squadriglia’s pilot Sergente Piero Hosquet and nine other pilots for a total of eleven. Among them were Capitano Simeone Marsan (the CO), Tenente Irzio Bozzolan, Tenente Aldo Bonuti, Sergente Maggiore Gino Bogoni and Sergente Tolmino Zanarini. The Squadriglia’s other six pilots were Tenente Giuseppe Costantini, Maresciallo Bruno Castellani, Sergente Maggiore Rodolfo Benco, Sergente Maggiore Bruno Celotto, Sergente Renato Mingozzi and Sergente Maggiorino Soldati.
The 368^a Squadriglia formation was composed of nine aircraft: Capitano Bruno Locatelli (CO), Tenente Giuseppe Zuffi, Sottotenente Furio Lauri, Sergente Maggiore Davide Colauzzi, Sergente Maggiore Annibale Ricotti, Sergente Maggiore Alvise Andrich, Sergente Stefano Fiore, Sergente Ottorino Ambrosi, Sergente Mario Turchi. Tenente Orfeo Paroli and Maresciallo Guido Paparatti followed in the Ca.133 of the Squadriglia (Paroli and Fiore were just transferred from 367^a Squadriglia).
On 25 September the 151^o Gruppo transferred from Benghazi to El Adem where it replaced the 9^o Gruppo C.T.

Between 15:30 and 15:45 on 10 December, a formation from the whole 151^o Gruppo took off from A3 to escort Ba.65s in the Bir Enba – Sidi Barrani area. The 366^a and 367^a Squadriglie flew direct cover of the assault aircraft while the 368^a Squadriglia acted as top cover.
Pilots from 366^a Squadriglia were Capitano Bernardino Serafini, Tenente Guglielmo Chiarini, Sottotenente Amedeo Guidi, Sottotenente Carlo Albertini, Sergente Maggiore Cesare Chiarmetta, Sergente Maggiore Fiorenzo Milella and Sergente Antonio Camerini. Pilots from the 368^a Squadriglia were Capitano Bruno Locatelli, Sergente Maggiore Davide Colauzzi, Tenente Orfeo Paroli (aborted due to mechanical problems), Sergente Ottorino Ambrosi, Tenente Giuseppe Zuffi, Sergente Mario Turchi and Sottotenente Furio Lauri together with Maresciallo Giulio Cesare of the 366^a Squadriglia. Not all the participating pilots from the 367^a Squadriglia are known but included were Capitano Irzio Bozzolan, Sergente Maggiore Rodolfo Benco, Sergente Maggiore Gino Bogoni, Sergente Zanarini, (plus possibly other three pilots).
After the attack of the Bredas, the close escort Squadriglie went down to strafe. The 366^a Squadriglia did five passes and then it was the turn of the 367^a Squadriglia. The weather in the meantime was again deteriorating and was not possible to maintain visual contact between the two covering Squadriglie and the strafing one.
Because of this, the 367^a Squadriglia was surprised from astern by a formation of Glosters while intent in strafing. After a short combat the CR.42s were able to disengage, claiming only a probable victory by an unknown pilot but losing Sergente Bogoni’s CR.42 and getting Sergente Maggiore Benco’s (wounded in the right foot) and Sergente Zanarini’s fighters damaged. Capitano Bozzolan had a narrow escape when pursued by two Gladiators that damaged his engine; he was forced to land in the midst of the enemy armoured cars with a stopped engine. Suddenly the Fiat A74 engine restarted and Bozzolan was able to do a touch-an-go, just managing to return to A3.
They had run into Gladiators from 3 RAAF Squadron. Four Gladiators piloted by Squadron Leader Ian McLachlan, Flight Lieutenant Gordon Steege, Flying Officer Alan Gatward and Flying Officer B. L. Bracegirdle had taken off from ALG 74 at 15:40 to carry out an offensive patrol over Tummar. They reported encountering twelve CR.42s that were ground strafing Allied troops near Tummar West. The Gladiators attacked the enemy aircraft and in the ensuing battle, Squadron Leader McLachlan shot one down which he saw strike the ground whilst Flight Lieutenant Steege and Flying Officer Gatward each got a possible. These were later confirmed. All Gladiators returned to base at 17:10. According to some sources Steege and Flying Officer Gatward each claimed 1 and 1 probable CR.42 in this combat, but this can’t be verified with 3 RAAF Squadron’s Operations Record Book.
While this combat was taking place the other two Italian Squadriglie didn’t notice anything but the sand thunderstorm below them.
While coming back, the 368^a Squadriglia intercepted a Hurricane that was strafing along the road between Sidi Barrani and Buq-Buq. It was shot at by Locatelli, Zuffi, Colauzzi, Ambrosi and Cesare and although clearly hit was seen to escape and was claimed only as a damaged. It seems possible that this was the Hurricane of 23-year-old Lieutenant Jacobus George Fischer (SAAF no. 202883), an SAAF pilot attached to 33 Squadron, which was lost during an evening reconnaissance of the road west of Sidi Barrani.
During the landing at Amseat, two Hurricanes attacked the Bredas, shooting at them and then retreating at full speed. The assault planes didn’t suffer serious damage. They were the three Ba.65s from the 159^a Squadriglia flown by Tenente Adriano Visconti, Sergente Maggiore Pietro Scaramucci and Sergente Paolo Perno, which had reached A3 the same morning to operate with the 168^a Squadriglia. Visconti was the one attacked by the British fighters but landed safely with his wingmen at 16:45. Back at base, they reported that the attack, done in awful weather conditions was met by heavy AA fire. Visconti used two 50 kilos bombs, seventy 2 kilos bombs, 320 rounds of 12,7 mm and 370 rounds of 7,7 mm ammunition. The identity of their attackers remains unsure but was probably Hurricanes from 33 Squadron.

Starting from 09:00 on 19 December, nine Hurricanes from 274 Squadron took off with fifteen minutes intervals during the morning. Then at least seven others took off for a second mission, this time taking off with 25 minutes intervals. Although explicitly ordered to keep clear of fighters they engaged CR.42s on two separate occasions during the day.
Second Lieutenant Talbot (P3721) claimed a confirmed victory over a CR.42. He was flying at 17,000 feet, 30 miles west of Bardia (Great Gambut) when at 13:05 he discovered two formations of six CR.42s stepped up to right and flying one mile to starboard. He approached unobserved and attacked a straggler of the formation. He reported:

“attacked by remainder of formation. 1 CR 42 spiralled down after attack and was later seen burning on the ground by Flying Officer Greenhill. CR 42s where on offensive patrol not escorting bombers.”

“the CR 42s were 11 or 12 in a bunch (no formation). I delivered an attack from astern and the enemy immediately attacked, 1 CR 42 was badly damaged (probably shot down), 6 holes in own aircraft through main spar. Enemy a/c on offensive patrol showing determination. Holes in own aircraft about 303 size (1 e/a seen burning after engagement by 2nd Lieutenant Talbot).”

Zanarini ended the war with 1 shared probable biplane victory.

Claims:

Kill no.	Date	Time	Number	Type	Result	Plane type	Serial no.	Locality	Unit
	1940
	19/12/40	12:15-14:15	1/11	Hurricane (a)	Shared probable	Fiat CR.42		S Sidi Azeiz	367a Squadriglia
	19/12/40	12:15-14:15	1/11	Hurricane (a)	Shared damaged	Fiat CR.42		S Sidi Azeiz	367a Squadriglia
	19/12/40	12:15-14:15	1/11	Hurricane (a)	Shared damaged	Fiat CR.42		S Sidi Azeiz	367a Squadriglia

Biplane victories: 1 shared probably destroyed, 2 shared damaged.
TOTAL: 1 shared probably destroyed, 2 shared damaged.
(a) Claimed in combat with Hurricanes from 274 Squadron, which claimed 1 and 1 probable CR.42 without losses. 151^o Gruppo claimed 1 probable and 2 damaged Hurricanes while suffering 1 badly damaged CR.42 and 2 lightly damaged. The 70^a Squadriglia claimed 1 damaged Hurricane while suffering 1 damaged CR.42.

Sources:
A History of the Mediterranean Air War 1940-1945: Volume Two – Christopher Shores and Giovanni Massimello with Russell Guest, Frank Olynyk & Winfried Bock, 2012 Grub Street, London, ISBN-13: 9781909166127
Annuario Ufficiale Delle Forze Armate Del Regno D’Italia Anno 1943. Part III Regia Aeronautica – 1943 Istituto Poligrafico Dello Stato, Roma
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
Elenco Nominativo dei Militari dell' A. M. Decorati al V. M. Durante it Periodo 1929 - 1945 2 Volume M - Z
Fiat CR.42 Aces of World War 2 - Håkan Gustavsson and Ludovico Slongo, 2009 Osprey Publishing, Oxford, ISBN 978-1-84603-427-5