Sejm (parliament) and King Sigismund III Vasa, brilliantly distinguished himself, capturing fortress after fortress and repulsing the duke of Södermanland, afterwards Charles IX, from Riga, however Reval, Pernau, and Narwa (Narva, Narew) remained under Swedish control. In 1604 he captured Dorpat, defeated the Swedish generals in the battle of Weissenstein (nowadays Paide) (often winning against superior odds, like at Weissenstein where he had only 2,300 men and defeated a 6,000 man Swedish force; Chodkiewicz wrote in his memoirs this was a decisive battle and one of his greatest victories, with Polish–Lithuanian losses 81 dead, 100 wounded and Swedish losses approaching half of their army). For his valour Chodkiewicz was rewarded by the king with the grand hetman buława of Lithuania. However, the war was neglected by the Commonwealth's parliament, which turned a deaf ear to all his requests for reinforcements and for supplies and money to pay his soldiers. The Commonwealth's de-centralised financial system (all taxes had to be agreed upon by all the nobility at Sejm and regional Sejmiks) meant that the Commonwealth treasury was almost always empty. This flaw plagued the Commonwealth for centuries. Chodkiewicz nevertheless more than held his own against the Swedes. He instituted a new form of warfare based upon his use of the elite hussar cavalry and consequently the Swedes were defeated again and again in the open field. First the Poles attacked Swedish cavalry, after which they usually attacked demoralized Swedish infantry which was unable to retreat at all, and usually annihilated whole formations of this infantry. In 1605 the Swedes again spent large sums of money to conscript a new massive army. The Riksdag spent much cash on conscripting new formations and as well as this, Russian tsar Boris Godunov gave the Swedes much financial help, likely attempting to keep both Sweden and the Commonwealth busy during the Time of Troubles. The Swedes were able to hire large numbers of mercenaries, as well as hiring many siege engineers from all over Europe. In 1605, a few miles from Reval, a 5,000 strong army led by Anders Lennartson of Forstena landed in Estonia again. Several days later another Swedish expedition, numbering around 4,000 and led by Count Frederick Joachim Mansfeld, landed near and besieged the fortress of Dünamünde (Daugavgrīva, Dynemunt) near Riga, although without any success. After this setback they began laying siege to Riga. Their main mission was to capture this important