He graduated from a military school, but in 1956 he left the army protesting against the suppression of the 1956 Revolution.
For the following decades, up to 1985 he has been working for the Historical Institute of the Hungarian Academy of Sciences.
[1][2] His main research fields were the general history of the diplomacy, and the Hungarian politics between the World Wars (1930s-1940s).
As from 1963 until his death he was teaching history of diplomacy at Marx Károly University of Economics.
He served as editor of the Történelmi Szemle (Historical Review) between 1972–1985, and as member of the board of the World Association of the Hungarians after 1986.