the palaeographic analysis of the original manuscript of De Administrando Imperio, the estimation of the number of inhabitants in medieval Croatia between 440 and 880 thousand people, and military numbers of Franks and Byzantines - the Croatian military force was most probably composed of 20,000-100,000 infantrymen, and 3,000-24,000 horsemen organized in 60 allagions. but these numbers are generally taken as a considerable exaggeration. King Dmitar Zvonimir of Croatia took the hard line against the Byzantine Empire and joined the Normansin wars against Byzantium. When Robert Guiscard, Duke of Apulia, invaded the western Balkan provinces of the empire in 1084, Zvonimir sent troops to his aid. King Petar Svačić's troops maintained resistance against repelling Hungarian assaults at Mount Gvozd in the war for the succession of the Croatian throne. At the end, the last native Croatian king was defeated and killed by King Coloman of Hungary in the Battle of Gvozd Mountain (1097). Notable wars and battles of early and high medieval times Notable wars and battles that included Croatian army: Siege of Trsat (799) Battle of Kupa (819) Battle of Drava River (925) Croatian-Bulgarian wars Battle of the Bosnian Highlands (926) Battle of Gvozd Mountain (1097) Siege of Zadar (1202) – part of Fourth Crusade Fifth Crusade (1213–1221) Battle of Klis Fortress (1242) – part of Mongol invasion of Europe Battle of Grobnik field (1242) Zadar-Venice War (1311-1312) Battle of Bliska (1322) Louis I of Hungary's Dalmatian Campaign Battle of Samobor (1441) Croatian-Ottoman Wars (15th–18th centuries) Early confrontations Battle of Una (1483) Battle of Vrpile Gulch (1491) Hundred Years' Croatian–Ottoman War Battle of Krbava field (1493) Battle of Dubica (1513) Siege of Klis (1524) Siege of Jajce (1524) Battle of Mohács (1526) Hungarian campaign of 1527–1528 Balkan campaign of 1529 Siege of Vienna (1529) Little War in Hungary (1530 – c.1552) Siege of Varaždin (1527) Siege of Güns (1532) Katzianer's Campaign (1537) Battle of Szigetvár (1566) Siege of Gvozdansko (1577–1578) Battle of Brest (1592) Battle of Sisak (1593) Long War (1593–1606) Battle of Brest (1596) Austro-Turkish War (1663–1664) First Battle of Novi Zrin (1663) Battle at Jurjeve Stijene (1663) Second Battle of Novi Zrin (1663) Nikola Zrinski's Winter Campaign (1664) Battle of Krapina (1664) Third Battle of Novi Zrin (1664) Battle of Saint Gotthard (1664) Great Turkish War (1683–1699) Siege of Virovitica (1684) Osijek Campaign (1685) Siege of Buda (1686) Battle of Mohács (1687) - resulted in liberation of Osijek