In the form of biographical probe, the study follows the stories of an individual, the Czech officer Karel Kubíček (1896–1964) against the backdrop of historical events of the “turbulent” 20th century. As a passionate patriot, he returned from the World War 1 as the officer of CS Legions in Russia, serving as a professional soldier in the CS Army for two interwar decades. However, for personal reasons, he remained in its armed forces even after the formation of the Slovak State. He participated in the fights against Hungary, Poland and the campaign to USSR. In 1944, as the regiment commander in Italy, he switched to the Allies and joined the CS foreign resistance. Although being of pro-Czechoslovak and anti-Fascist mind-set, even participating in the rescue of Jewish citizens, during his service in Belarus, he was forced to act against his conviction and take responsibility for the repressions against the captured Soviet Partisans. In February 1948, he attempted for coexistence first with the new regime, however, as soon as in spring 1950, he was released from the Army. Afterwards, the Communist regime used his war activity in the mid 1950’s in preparing a new surge of cleaning in the Army. In the process, not managed fully correctly, he was then sentenced for “war crimes” to nine years of prison, to be released in 1957.