What is the main conflict in Last of the Breed by Louis L'Amour?

Last of the Breed is the journey for freedom of Major Joe Makatozi, or Joe Mack as he is called, in the sub-zero temperatures of the Siberian taiga. Mack is a test pilot for the United States Air Force, and his plane has been brought down by a Soviet Union Colonel named Arkady Zamatev sometime after the end of World War II. Mack is in a prison camp in Siberia when he is forced to return to the ways of American Indian ancestor to escape from prison and from Siberia.