Complex sentence: The Frankopans and Ban Derenčin wanted to intercept the Ottomans, and gathered an army of around 3,000 cavalry and 8,000 infantry from all parts of Croatia, however a part of the army consisted of peasants from the surrounding areas of Krbava.
Split into simpler sentences: The Frankopans and Ban Derenčin wanted to intercept the Ottomans and gathered an army of around 3,000 cavalry and 8,000 infantry from all parts of Croatia. However, a part of the army consisted of peasants from the surrounding areas of Krbava.