It is known that in the summer of 1944 Ambrazevičius left for Germany, and in 1948 for the United States, where he edited a Catholic daily, Darbininkas, and continued his work in the Supreme Committee for the Liberation of Lithuania in exile. He published a number of leaflets illustrating German and Soviet crimes in Lithuania and the Lithuanian resistance, for example, In the Name of the Lithuanian People (1946) and Appeal to the United Nations on Genocide (1951). In 1964 he published a book Alone, all alone about the Lithuanian armed resistance.
The text provides information about Ambrazevičius's activities as a journalist, activist, and writer who documented the atrocities committed against Lithuania by both Nazi Germany and the Soviet Union.