I had difficulty raising sufficient troops to repel the Italo-Normans, John II could field armies as large as those of the Kingdom of Hungary and Manuel I assembled an army capable of defeating the large crusading force of Conrad III. Other historians have, however, made attempts to estimate overall army size. During the reign of Alexios I, the field army may have numbered around 20,000 men. By 1143, the entire Byzantine army has been estimated to have numbered about 50,000 men and continued to remain about this size until the end of Manuel's reign. The total number of mobile professional and mercenary forces that the emperor could assemble was about 25,000 soldiers while the static garrisons and militias spread around the empire made up the remainder. During this period, the European provinces in the Balkans were able to provide more than 6,000 cavalry in total while the Eastern provinces of Anatolia provided about the same number. This amounted to more than 12,000 cavalry for the entire Empire, not including those from allied contingents. Modern historians have estimated the size of Komnenian armies on campaign at about 15,000 to 20,000 men, but field armies with less than 10,000 men were quite common. In 1176 Manuel I managed to gather approximately 30,000-35,000 men, of which 25,000 were Byzantines and the rest were allied contingents from Hungary, Serbia, and Antioch, though this was for an exceptional campaign. His military resources stretched to putting another, smaller, army in the field simultaneously. After the death of Manuel I, the Byzantine army seems to have declined in numbers. In 1186, Isaac II assembled 250 knights and 500 infantry from the Latin population of Constantinople, an equivalent number of Georgian and Turkish mercenaries, and about 1,000 Byzantine soldiers. This force of possibly 2,500 managed to defeat Alexios Branas' rebellion. The rebel army which could not have numbered much more than 3,000-4,000 men had been the field force sent against the Bulgarians. Another force of about 3,000-4,000 was stationed at the city of Serres. Expeditionary forces remained around the same size for the rest of Angeloi period. In 1187 Isaac II campaigned with 2,000 cavalry in Bulgaria. Manuel Kamytzes' army that ambushed Emperor Frederick Barbarossa in 1189 was about 3,000 strong; it consisted of his own force of 2,000 cavalry and the garrison at Philippopolis. Supporting the army The Byzantine army of the Komnenian era was recruited and