While it was not research, the Russian army and this officer had an extraordinary encounter with a creature called Almasty. There seem to be several versions of what happened in 1925 and I will tell them all.

Major General Mikhail Stephanovitch Topilski was the commander of a cavalry regiment in the Red Army during the Civil War after the Communist Revolution of 1917. In 1925, he and his men were given the task of hunting down anti-Communist forces in the Pamir Mountains southwest of the Tien Shan. They encountered more than just fighting men.