Every fourth soldier in the Black Army had an arquebus, which was an unusual ratio at the time. The high price of medieval gunpowder prevented them from raising it any further. Even a decade after the disbandment of the Black Army, by the turn of the 16th century, only around 10% of the soldiers of Western European armies used firearms. The main troops of the army were the infantry, artillery and light and heavy cavalry. The function of the heavy cavalry was to protect the light armoured infantry and artillery, while the other corps delivered sporadic, surprise assaults on the enemy.