and desired his downfall. The loss of the Cumans was painful for Béla, because they were the one army in Europe who had experience fighting the Mongols. The battle Initial actions The Mongol vanguard reached Pest on 15 March and began to pillage the neighbouring area. King Béla forbade his men to attack them, as the Hungarian army was still unprepared. Even so, Duke Frederick attacked and defeated a minor raiding party and used this to attempt to smear Béla as a coward. After this "heroic" act, Duke Frederick returned home, abandoning his Hungarian rival. Meanwhile, the Mongols had destroyed several other Hungarian forces that were unable to link up with the main army in time. Ugrin Csák, Archbishop of Kalocsa, also tried to attack a Mongol contingent, but he was lured to a swamp and his armoured cavalry became irretrievably stuck in it. He barely escaped with his life. The army of the Count Palatine also was annihilated, as previously mentioned. The southern Mongol army also defeated another Hungarian force at Nagyvárad. Finally, the king decided to offer the Mongols battle, but they began to retreat. This affirmed the opinion of the nobles that the Mongols were not a threat and the king's behaviour was not cautious but cowardly. After a week of forced marches and frequent Mongol attacks, the Hungarian army, a collection of varied Hungarian forces, reached the flooded River Sajó. The size of the Hungarian army is unknown. The closest hard evidence comes from the Epternacher Notiz, a contemporary account of the battle by a German chronicler which reported that the Hungarians lost 10,000 men, suggesting their whole army was around that size. For the Mongols, the closest hard evidence comes from the works of Rashid al-Din, drawing on Mongol sources, which report that the Mongol force for the entire Central European invasion was 40,000 horsemen, of which only a portion were actually at Mohi. For their part the Mongols claimed their enemy outnumbered them, with Juvaini (drawing on Mongol sources) reporting that the Mongol reconnaissance force (10,000 men) estimated the Hungarian army was twice as numerous as the Mongol army. However, a clearly exaggerated estimate of 400,000 for the Hungarian army was provided, implying 200,000 Mongol troops. Juvaini's wording also implied that the Hungarian host was mostly mounted. Hungarian chroniclers claimed that the Mongols were superior numerically many times over, though they also give unlikely