Guido Fibbia served in the VI Gruppo C.T. in the Spanish Civil War were he claimed 3 victories.

When the war broke out he served in the 365^a Squadriglia.

He was however soon transferred to the 95^a Squadriglia, 18^o Gruppo C.T. This unit was at the time equipped with the Fiat CR.42.
He was with the unit during its operations in the Battle of Britain as a part of C.A.I. when 18^o Gruppo was temporarily assigned to the 56^o Stormo. They were based at the Saturn base (Ursel).

In January the unit was re-located to Libya.

Early in the morning on 14 April 1941, Tobruk harbour was attacked by Ju87s of III/StG1 and II/StG2 plus seven from 96^o Gruppo Autonomo BaT. These bombers were escorted by eight G.50bis of 155^o Gruppo CT, four CR.42s of 18^o Gruppo and five Bf110s of III/ZG26. Flight Lieutenant James Duncan Smith of 73 Squadron took off alone (Hurricane Mk.I P2652 or P2634) to investigate. Flight Sergeant Herbert Garth Webster (RAF No. 519739) (Hurricane Mk.I V7553 "TP-E") was ordered to join Sergeant Ellis (V7299 "TP-D") and two pilots of C Flight to assist Smith some five minutes later. A number of Ju87s were encountered over the harbour. Ellis promptly shot down two but Webster, who had just latched onto the tail of another Stuka was attacked by two G.50bis flown by Tenente Carlo Cugnasca and Maresciallo Angelo Marinelli of 351^a Squadriglia. The blazing Hurricane crashed at 07.43 within the perimeter and taking Webster to his death. It seems probable that CR.42s also engaged the Hurricanes at this stage, Sottotenente Franco Bordoni-Bisleri and Maresciallo Guido Fibbia of 95^a Squadriglia each claiming one destroyed. However Webster was the only lost in this combat. RAF claimed 7 destroyed, 1 probable and 1 damaged in this combat while the Axis lost four Ju87s and two G.50bis. The G.50bis were the ones flown by Tenente Carlo Cugnasca (who had flown in the C.A.I during the Battle of Britain) and Maresciallo Angelo Marinelli. Regia Aeronautica claimed 3 destroyed while RAF only lost 1.

After the Italian capitulation in 1943 he served in the Italiana Aeronautica Nazionale Repubblicana (ANR) where he served in the 2^a Squadriglia of 1^o Gruppo C.T. of the ANR.

Following five consecutive days of bad weather 600+ B-17s and B-24s attacked targets in northern Italy on 22 June 1944. The B-17s hit marshalling yards at Fornova di Taro, Modena and Parma while the B-24s hit six marshalling yards and two bridges in Italy, an automobile factory at Turin and an automobile depot at Chivasso. Escorting USAAF fighters flew 250+ sorties in support of the missions.
At noon, 1^oand 2^o Gruppi together with JG77 attacked 400 B-24s and 60 P-38s in the Bologna-Ferrara area. Four P-38s were sighted by 2^a Squadriglia’s MC.205s while climbing to reach the Italians. Despite Capitano Amedeo Guidi’s order to wait, Sergente Spartaco Petrignani, with Maresciallo Fibbia close behind, dived and got on the tail of Lieutenant Tolmie (of the 97th FS, 82nd FG). At first his tracers fell between the P-38’s tail booms, but he tightened his turn and was beginning to score hits when he saw another American sitting on his tail. A sharp split-S followed by a vertical dive got Petrignani out of trouble just as Fibbia was announcing over the R/T that the first P-38 had exploded.
1^o Gruppo claimed two of the escort shot down (claimed at 9500 meters altitude east of Modena at 12:10 by Fibbia and Capitano Guidi) and two probables, but in fact only Tolmie was missing.
Feldwebel Ullrich from 6./JG 77 claimed one B-24 at 11:40 south of Cesana while Feldwebel Staroste of 2./JG 77 claimed a B-17.
USAAF fighters claimed one probable MC.202 by First Lieutenant Merrill Adelson of 96th FS, one damaged Bf109 by Lieutenant Richard Willsie of 96th FS and a damaged MC.202 by Lieutenant Rosier of 82nd FG. The claims were made between 11:45-12:00 south south-west of Ferrara.

Guido Fibbia ended the war with 4 biplane victories and a total of 9.
During the war he was decorated with two Medaglie d’argento, one Medaglia di bronzo, one Croce di guerra and the German Iron Cross 2nd Class.

Claims:

Kill no.	Date	Time	Number	Type	Result	Plane type	Serial no.	Locality	Unit
	1941
1	14/04/41	Morning	1	Hurricane (a)	Destroyed	Fiat CR.42		Tobruk	95a Squadriglia
	1944
9	22/06/44	12:10	1	P-38 (b)	Destroyed	MC.205		E Modena	2a Squadriglia

Biplane victories: 4 destroyed.
TOTAL: 9 destroyed.
(a) Regia Aeronautica claimed 3 destroyed while RAF only lost 1 (Flight Sergeant Herbert Garth Webster of 73 Squadron shot down by Tenente Cugnasca and Maresciallo Marinelli of 351^a Squadriglia - both these pilots were also killed in this combat) in this combat. RAF claimed 7 destroyed, 1 probable and 1 damaged while the Axis lost four Ju87s and two G.50bis.
(b) Claimed in combat with P-38s from 82nd FG, which lost one P-38 (Lieutenant Tolmie, 97th FS, MIA) while claiming one probable enemy fighter and two damaged. 2^a Squadriglia claimed at least two P-38s without losses.

Sources:
3^o Stormo, storia fotografica - Dai biplani agli aviogetti - Carlo Lucchini and Leproni Enrico, 1990 Gino Rossato Editore
Air War Italy 1944-45 - Nick Beale, Ferdinando D'Amico and Gabriele Valentini, 1996 Airlife Publishing, Shrewbury, ISBN 1-85310-252-0
Assi Italiani Della Caccia 1936-1945 - 1999 Aerofan no. 69 apr.-giu. 1999
Hurricanes over Tobruk - Brian Cull with Don Minterne, 1999 Grub Street, London, ISBN 1-902304-11-X
Italian Aces of World War 2 - Giovanni Massimello and Giorgio Apostolo, 2000 Osprey Publishing, Oxford, ISBN 1-84176-078-1
The Commonwealth War Graves Commission