Sergey Konstantinovich Trebushinin, born in 1925, was called up for active military service on December 22, 1942 and was sent to the 1st Leningrad Military Infantry School named after S. M. Kirov. After graduating in January 1943 he joined the 300th Airborne Regiment of the 21st Landing-Force Brigade of the 3d Ukrainian Front with the rank of a Second Lieutenant. As a part of the brigade Sergei Konstantinovich participated in the battles for the liberation of Poland, Hungary, Austria, in the assualt-crossing of the Danube river, in the Balaton Defensive Operation.