Battle of Krbava Field
After the fall of the Bosnian Kingdom into the Ottoman hands in 1463, the southern and central parts of the Kingdom of Croatia remained unprotected, the defence of which was left to croatian gentry who kept smaller troops in the fortified border areas at their own expense. The Ottomans meanwhile reached the river Neretva and having conquered Herzegovina in 1482, they found their way toward Croatia, skilfully avoiding the fortified border towns. Through the concquest of the Kingdom of Croatia, the Ottoman light cavalry pushed its way towards the towns of Carinthia and Carniola, threating thus to a border area of Venice as well.
In order to stop such invasions, in the summer of 1493 the Croats rallied their troops under the command of Viceroy Emerik Derencin at Krbava field in southern Croatia, and lay in wait there to trap the Ottomans. In the meanwhile, the Ottoman Sandjak-beg Hadum Jakub Pasa with some 8000 light (but heavily armed) cavalry was returning from a pillage expedition to Styria and croatian Zagorje.
Croatian feudal army under the command of Viceroy Derencin at Krbava field had some 2000 heavy feudal cavalry and some 8000 infantry from all parts of the Kingdom of Croatia.
The Croats overestimated their powers.
The sunrise of September 9, 1493 marked the beginning of one of the bleakest day of croatian history.
The croatian army rushed at the Ottomans. After first luring Croats into plains, where light cavalry were in advantage over heavy feudal cavalry, surrounding it from the front, one flank and rear. Croatian army suffered a total defeat in which the cream of the old croatian nobility perished to a man.
The defeat was resounding. In one single day, around 7000 croatian soldiers lost their lives on the bloody field of Krbava on the historical day of September 9, 1493 including many of croatian feudal nobleman of the time.
The defeat at Krbava field shook all the social strata in Croatia; however it did not dissuade the Croats from making even more decisive and persistent attempts at defending themselves against the attacks of the much more powerful enemy.