Yefim Vasil’yev was born in 1916.

He graduated from Kachinskaya flight school in 1938.

Leitenant Vasil’yev took part in the Soviet-Finnish Winter War serving in 72 SmAP-SF of the Air Force of the Northern Fleet between January and March 1940. In this regiment he flew I-15bis.

When Germany invaded the Soviet Union on 22 June 1941, leitenant Vasil’yev still served in 72 SmAP-SF.
At the outbreak of the war, the regiment was equipped with I.15bis, I-153s and I-16s.

The I-153s from 72 SmAP-SF claimed Ju 88s during the day and two of them were claimed by leitenant Vasil’yev and leitenant Maksim Vinichenko, which claimed one each.

Starshiy leitenant Vasiliy Volovikov and leitenant Vasil’yev claimed a shared Ju 87 over Vayenga airfield on 22 July.
Leitenant Vasil’yev was killed in air combat during the day (same combat?).

At the time of his death, Vasil’yev was credited with 2 biplane victories.

Claims:

Kill no.	Date	Time	Number	Type	Result	Plane type	Serial no.	Locality	Unit
	1941
1	08/07/41		1	Bf 109	Destroyed	Polikarpov I-153		Air Force of the Northern Fleet	72 SmAP-SF
2	17/07/41		1	Ju 88	Destroyed	Polikarpov I-153		Air Force of the Northern Fleet	72 SmAP-SF
	22/07/41		1/2	Ju 87	Shared destroyed	Polikarpov I-153		Vayenga airfield	72 SmAP-SF

Biplane victories: 2 and 1 shared destroyed.
TOTAL: 2 and 1 shared destroyed.

Sources:
All aces of Stalin 1936-1953 – Mikhail Bykov, 2014
Soviet Aces 1936-1953
Soviet Fighter Pilots 1936-1953 - Mikhail Bykov