In March 1933, Carlos Serra Pablo-Romero served in Grupo 2-G-3, which was equipped with Fiat CR.32s

In March 1938, the Group took part in Aragón offensive.

In the afternoon on 12 March, 2-G-3 encountered enemy aircraft attempting to stop the sweeping advance in the Aragon offensive. During the afternoon 18 Fiats, led by capitán Ángel Salas (CO) and capitán Joaquín García Morato, escorted Ju 52/3ms on a raid, and having completed this task made a sweep of the front as far as Híjar, where they encountered 19 Chatos that were escorting 11 SBs. In the ensuing dogfights, capitán Salas claimed one probable I-15, capitán Morato claimed two I-15s while teniente Miguel García Pardo (2-E-3) destroyed one I-15, which fell near Híjar. Teniente Miguel Guerrero García (1-E-3) set fire to another I-15, whose pilot took to his parachute from a very low height. Teniente Julio Salvador (CO 1-E-3) attacked another machine, which began to trail smoke, but he was unable to continue his attack as his Fiat was almost out of fuel; unable to return to his base at Tauste, he had to land at Saragossa. Teniente Serra Pablo-Romero, teniente Carlos Bayo (2-E-3) and teniente Rodolphe de Hemricourt (2-E-3) each were successful in shooting down an I-15. Teniente Manuel Vázquez Sagastizábal (1-E-3) attacked three SBs claiming one of them that crashed while attempting to land near Escatrón. No CR.32s were lost in this combat.
The I-15 shot down by teniente García Pardo was from 1^a/26 and was flown by Soviet pilot starshiy leitenant Bela Arady, who bailed out badly burned and landed in Republican lines. The wreckage of this machine (I-15 CA-057) was recovered subsequently, and a piece of it was retained, on which ensuing victories of 2-G-3 were recorded, as well as the names of all those in the group who were killed.

While operating over Teruel on 30 May, capitán Ángel Salas, teniente Miguel García Pardo and teniente Serra Pablo-Romero, all received damage to their aircraft.

On 7 February 1939, teniente Serra Pablo-Romero from 2-E-3 suffered an accident in Cataluña and CR.32 3-71 was destroyed.

In 1942, he served in the Spanish expeditionary squadron in Russia.

On 29 October, 15. (Span)/JG 51 made one clam when capitán Serra Pablo-Romero claimed a LaGG-3 at 12:25, at 600 meters south-east of Kislino (he also claimed an additional LaGG-3 as a probable during the day).

Serra Pablo-Romero ended the war with 1 biplane victory and a total of 2.

Claims:

Kill no.	Date	Time	Number	Type	Result	Plane type	Serial no.	Locality	Unit
	1938
1	12/03/38	afternoon	1	I-15 (a)	Destroyed	CR.32		Híjar	2-G-3
	1942
2	29/10/42	12:25	1	LaGG-3	Destroyed	Bf 109F-2		SE Kislino	15. (Span)/JG 51
	29/10/42		1	LaGG-3	Probably destroyed	Bf 109F-2		Russia	15. (Span)/JG 51

Biplane victories: 1 destroyed.
TOTAL: 2 destroyed, 1 probably destroyed.
(a) 2-G-3 claimed 7 I-15s, 1 probable and 1 damaged and 1 SB destroyed without losses. Republican losses is not known.

Sources:
Air Aces - Christopher Shores, 1983 Presidio Press, Greenwich, ISBN 0-89141-166-6
Air War over Spain - Jesus Salas Larrazabal, 1974 Ian Allan Ltd, Shepperton, Surrey, ISBN 0-7110-0521-4
Fiat CR.32 Aces of the Spanish Civil War - Alfredo Logoluso, 2010 Osprey Publishing, Oxford, ISBN 978-1-84603-983-6
Joaquin Garcia-Morato - Best Ace of Spanish Civil War (WWII Ace Stories) - Mihail Zhirohov, 2003
Wings Over Spain - Emiliani Ghergo, 1997 Giorgio Apostolo Editore, Milano
Additional information kindly provided by Alfredo Logoluso and Ondrej Repka.