The autumn of 1937 saw the establishment of the Grupo N^o 26 (I-15) and on 9 October 1937, capitán Juan José Armario Álvarez was appointed CO of the Grupo, which initially comprised three escuadrillas with 15 aircraft each.
The Soviet 1^a Escuadrilla was led by Kapitan Yevgeniy Antonov and operated from Sagunto and Sabadel airfields, while teniente Gerardo Gil Sánchez headed up the Spanish 2^a Escuadrilla (capitán Chindasvinto González García had handed over command to his deputy, Gil, to act as an interim CO). Both operated on the Aragon front. The Spanish 3^a Escuadrilla was formed at Figueras under the command of teniente Juan Comas Borrás, which initially flew defensive patrols over the Catalan coast. The unit’s initial cadre of pilots consisted of Leopoldo Morquillas Rubio, Miguel Zambudio Martínez, Juan Olmos, José Redondo Martín, Antonio Britz Martínez, Rafael Sanromá Daroca and Antonio Nieto Sandoval-Díaz. Later, they were joined by José María Campoamor Peláez, Elías Hernández Camisón, Francisco Montagut Ferrer, Jesús Pérez Pérez, Alfredo de Albert Porcar and José Puig. Many of them were surviving pilots from the Northern front and later in the month the unit operated from Reus airfield.
Capitán Armario initially flew with the Soviet patrulla of the staff flight of the Grupo N^o 26, often accompanying Starshii Leitenant Stepanov.

On 28 December, 16 fighters from Grupo 2-G-3 clashed with nine I-15s and 12 I-16s directly above Teruel. Nationalist pilots were credited with shooting down four ‘Curtiss fighters’ and a Rata for the loss of Antonio López Sert (3-87) of Escuadrilla 1-E-3 (reportedly to small-arms fire). Teniente Carlos Bayo Alessandri (2-E-3) attacked a Chato head-on, scoring some hits. He made a second attack from astern and the enemy fighter began to lose height and crashed behind Republican lines near Villastar. Alférez Javier Allende Isasi (2-E-3) claimed two I-15s while alférez Jorge Muntadas Claramunt (2-E-3) claimed the fourth I-15 and alférez Manuel Vázquez Sagastizábal (1-E-3) claimed the I-16.
It seems that at least the 3^a/26 (I-15) was involved in this combat and they claimed four CR.32s during the day. The CO of the unit, teniente Juan Comas Borrás claimed two CR.32s while sargento Francisco Montagut Ferrer and Sanromá claimed one each.
The Republicans admitted the loss of teniente José M.^a Campoamor Peláez, who fell with his burning I-15 in the vicinity of La Muela, while two other aircraft returned to base damaged.

Sanromá ended the Spanish Civil War with 1 biplane victory.

Claims:

Kill no.	Date	Time	Number	Type	Result	Plane type	Serial no.	Locality	Unit
	1937
1	28/12/37		1	CR.32 (a)	Destroyed	I-15		Teruel area	3a/26

Biplane victories: 1 destroyed.
TOTAL: 1 destroyed.
(a) Probably claimed in combat with 2-G-3, which claimed 4 I-15s and 1 I-16 for the loss of 1 CR.32. The Republicans claimed 4 CR.42s with the loss of 1 I-15 and 2 damaged (unknown units).

Sources:
Fiat CR.32 Aces of the Spanish Civil War - Alfredo Logoluso, 2010 Osprey Publishing, Oxford, ISBN 978-1-84603-983-6
Fighter Pilots Of The Spanish Republic (Vol. 1) - Rafael A. Permuy López, Historica 36/39 no. 1, ISBN 84-87314-89-9
Spanish Republican Aces – Rafael A Permuy López, 2012 Osprey Publishing, Oxford, ISBN 978-1-84908-668-4