Mikhail Vasilhevich Kotyhov served as a volunteer in the 1^a/26 during the Spanish Civil War.

On 10 December 1937 and in order to camouflage a planned Nationalist offensive towards Madrid on the Guadalajara, the Republican air forces were to be destroyed on their airfields east of Zaragoza. A Nationalist force of 88 bombers and 56 fighters took part in the operation. The slower bombers (SM.81s and Ju 52/3ms) were to attack the nearby airfields in the Barbastro zone; the faster bombers (SM.79s, Breguet 20s, He 111s and Do 17s) those at Sariñena, Bujaraloz, Candasnos, Puebla de Híjar, Selgua, Pomar, Lérida and Balaguer. The Condor Legion’s bombers, which had to operate from more distant bases, would require refuelling before making their return flight, and facilities were provided at Sanjurjo.
The attacks failed to achieve the desired success, however; the airfields were empty and about 70 fighters were waiting in the air. It must be said that the Republicans were very well prepared to deal with surprise air attacks. They had constructed a large number of airfields and at each was based at most a single squadron, its aircraft widely dispersed around the airfield perimeter. In addition, they had built a number of decoy airfield on with mock-up aircraft.
At least, the VI and XVI Gruppi of the Aviazione Legionaria took part in this combat and Tenente Corrado Santoro of the 31^a Squadriglia (VI Gruppo) took part in an escort mission to bombers attacking Sariñena and Sottotenente Mario Visintini of the 25^a Squadriglia (XVI Gruppo) took part in his first combat, firing at some enemy aircraft but without claiming anything.
At the end of the battle, the Italians claimed eight I-15s shot down for just one CR.32 lost and its pilot KIA when Sottotenente Vittorio Barberis of the 32^a Squadriglia, was killed in action near Alcubierre when his CR.32 collided with I-15 CC-022, flown by Soviet pilot Kotyhov from the 1^a/26. The latter pilot also perished.
Group 2-G-3, which was flying below the Italians, climbed to their assistance and claimed seven I-15s without losses.
1.J/88 was airborne, with 15 Bf 109s flying deep into enemy territory. They were attacked by 30 enemy fighters. Oberleutnant Harro Harder recounted:

”Another major action on December 10. The Fiats patrolled the front, we flew deep into enemy territory with fifteen Bf 109s. Fifteen Curtisses and fifteen Ratas climbed up in close formation. There was nothing else to do, we attacked repeatedly, but so many aircraft immediately dove on us that we were happy just to escape in one piece.”

At the time of his death, Kotyhov was credited with 3 biplane victories.

Claims:

Kill no.	Date	Time	Number	Type	Result	Plane type	Serial no.	Locality	Unit
	1937
3	10/12/37		1	CR.32 (a)	Destroyed	I-15	CC-022	near Alcubierre	1a/26

Biplane victories: 3 destroyed.
TOTAL: 3 destroyed.
(a) Claimed in collision with Sottotenente Vittorio Barberis of the 32^a Squadriglia, who also was KIA.

Sources:
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
Polikarpov I-15, I-16 and I-153 Aces - Mikhail Maslov, 2010 Osprey Publishing, Oxford, ISBN 978-1-84603-981-2
Additional information kindly provided by Alfredo Logoluso.