Editing Bolesław III Wrymouth (section)

====Polish-German War of 1109====
In response to Bolesław's aggressive foreign policy, the [[Holy Roman Emperor]], [[Henry V, Holy Roman Emperor|Henry V]], undertook a punitive expedition against Poland in 1109,<ref>Wincenty Kadłubek: ''Kronika polska'', vol. III, cap. 18, pp. 133–138. See also K. Kmąk: [http://historia.org.pl/2009/08/28/wojna-polsko-niemiecka-1109/ ''Wojna polsko-niemiecka 1109 (in Polish)''] [retrieved 15 July 2014].</ref> assisted by [[Czech (people)|Czech]] warriors provided by Svatopluk of Bohemia. The alleged ''casus belli'' was to restore Zbigniew to his former position. The Emperor gave Bolesław an ultimatum: he would abandon the expedition only if Bolesław gave Zbigniew half of Poland to rule, formally recognized Henry as overlord and paid 300 pieces of fine silver as a regular tribute.<ref name="Kmąk">K. Kmąk: [http://historia.org.pl/2009/08/28/wojna-polsko-niemiecka-1109/ ''Wojna polsko-niemiecka 1109 (in Polish)''] [retrieved 15 July 2014].</ref> Bolesław rejected Henry's demands. During the negotiations between the Empire and Poland, the Polish ruler was in the middle of a war against Pomerania. On the west side of the [[Oder]] river, Henry V hurriedly gathered knights for his expedition against Poland.<ref name="Kmąk"/> Before the fight ended in Pomerania, the German troops were able to approach [[Głogów]].<ref>M. K. Barański: ''Dynastia Piastów w Polsce'', pp. 203–204.</ref>
[[Image:PsiePole MBielski.png|thumb|right|[[Battle of Hundsfeld]], from ''The Polish Chronicle'' of [[Marcin Bielski]] (1597)]]
The military operations mainly took place in [[Silesia]] in southwestern Poland, where Henry V's army laid siege to the major cities of Głogów, [[Wrocław]] and [[Bytom Odrzański]]. In addition to defending the towns, Bolesław conducted a guerrilla war against the Holy Roman Emperor and his allies. He reportedly defeated the expedition at the [[Battle of Hundsfeld]] on 24 August 1109,<ref name="Kmąk"/><ref>Wincenty Kadłubek describes this battle following the reports of Gallus Anonymus. However, at the end of the 19th century, historians recognized Kadłubek's relate as unreliable, as reflected, inter alia, [in:] [[Samuel Orgelbrand|S. Orgelbrand]]: ''Encyklopedia Powszechna'', vol. XII, ''Od Polska do Rohan'', p. 406.</ref> although the existence of this battle is doubted by historians because it was first recorded about a century later.<ref>''"S. Orgelbranda Encyklopedia Powszechna"'', Warsaw 1902, vol. XII, page 406</ref><ref>M. Kaczmarek, ''"Bitwa na Psim Polu"'', in: Encyklopedia Wrocławia, Wrocław 2000</ref>