Dr. Franjo Tuđman is one of the most important figures in Croatian and European contemporary history. Following his biography, we look at his life journey from Veliko Trgovišće to Zagreb, to study further and where he became more actively interested in history and historical science, all the way to his political activities and the most famous role as the first president of modern Croatia. As an active member of the Communist Party and one of the fighters of the National Liberation Movement, he followed the course of events in the Second World War, ie in Croatia, and actively deals with this topic in his scientific work. In most of his works, the theme of the National Liberation War and the Ustasha regime in Croatia prevailed. Through his works listed in this paper, we follow the course of the National Liberation War in Croatia, starting with the collapse of the Kingdom of Yugoslavia, one of the topics to which Tudjman always returns to the occupation of Germany and Italy, and the uprising of the Yugoslav peoples to resistance and revolution. His works should be read with consideration of what time Tudjman actually wrote and for whom, although he was declared a nationalist in the 1970s, because he often referred to Croatia and Croatian problems, which could not have been the case at the time. However, it should be acknowledged that Franjo Tuđman made a great contribution to historiography at the time, whose influence has extended to the present day, especially because of his presidential role in the 1990s, where he used all his military-theoretical knowledge.