Ivan Yefimovich Buslayev was born on 26 December 1903 to a peasant family in the village of Vsevolodchino,
Saratov Governorate, and graduated from a seven-grade incomplete secondary school. Conscripted into the
Red Army in November 1925, he was sent to serve as a
Red Army man with the 11th Rifle Regiment of the
4th Rifle Division at
Slutsk, Belarus, with which he spent most of the prewar years. Having graduated from the regimental school, Buslayev rose to squad leader, assistant platoon commander and starshina. He completed the accelerated course for commanders at
Bobruisk in 1929 and served as a commander of a rifle platoon and training platoon before commanding a machine gun company. Buslayev was sent to fight in the
Spanish Civil War between 10 March 1937 and 1 April 1938 and was wounded. After his return to the Soviet Union, Buslayev was appointed battalion commander in the 150th Rifle Regiment of the
50th Rifle Division at
Polotsk. From November 1938 he was assistant commander for personnel of the 148th Rifle Regiment of the division, and in early December was appointed chief of the division Course for
Junior Lieutenants of the Infantry. In May 1939 he became commander of the 49th Rifle Regiment of the division, with which he participated in the
Soviet invasion of Poland. Buslayev was appointed acting chief of the combat training department of the
3rd Army at
Riga in May 1940, but soon returned to Belarus in July to command the 603rd Rifle Regiment of the
161st Rifle Division at
Chausy. In the same year he also completed the
Vystrel course, which provided advanced training for regimental commanders. == World War II ==