After the Soviets entered northern Korea, he was arrested in 1945 and sent to the Siberian Gulags where he was able to meet his incarcerated father and died just weeks before he was to be released.
Yuri was born on Askold Island to the Polish settler Michał Jankowski and Olga Kuzniecowa.
He studied horse breeding in Texas, volunteered at the Agricultural University of Champaign, Illinois, and brought English purebreds by ship from San Francisco to his father's estate in Sidemi.
[1] Following the Russian revolution, the Jankowski family had to leave their home in Sidemi, Primorsky Krai in 1922 and moved not far away from the border to northern Korea where George sold nearly all his belongings in Harbin.
In 1945, the Soviet army entered northern Korea and since they had been supporting the enemy, the Japanese troops, Yuri was arrested and sent to the Gulags.
Some of the family including son Arseny, and daughters Victoria and Muza escaped through the south of Korea and then emigrated to the United States of America.
They had to put out sheets and lights to trap insects and one of the brothers had to stand on guard with a gun at the ready.
Yuri wrote about his hunting in his 1940 book and had hoped to write more but the manuscripts which he kept while in labour camp which weighed two pounds are thought to have been burned after his death.