Problem: Yes are an English progressive rock band formed in London in 1968 by singer Jon Anderson, bassist Chris Squire, guitarist Peter Banks, keyboardist Tony Kaye, and drummer Bill Bruford. The band have undergone numerous formations throughout their history; nineteen musicians have been full-time members. Since June 2015, it has consisted of guitarist Steve Howe, drummer Alan White, keyboardist Geoff Downes, singer Jon Davison, and bassist Billy Sherwood, with no remaining founding members. Yes have explored several musical styles over the years, and are most notably regarded as progressive rock pioneers.

In 2001, Yes released their nineteenth studio album Magnification. Recorded without a keyboardist, the album features a 60-piece orchestra conducted by Larry Groupe; the first time the band used an orchestra since Time and a Word in 1970. The record was not a chart success; it peaked at number 71 in the UK and number 186 in the US. The Yes Symphonic Tour ran from July to December 2001 and had the band performing on stage with an orchestra and American keyboardist Tom Brislin. Their two shows in Amsterdam were recorded for their 2002 DVD and 2009 CD release Symphonic Live. The band invited Wakeman to play with them for the filming, but he was on a solo tour at the time.  Following Wakeman's announcement of his return in April 2002, Yes embarked on their Full Circle Tour in 2002-2003 that included their first performances in Australia since 1973. The triple compilation album The Ultimate Yes: 35th Anniversary Collection was released in July 2003, reaching number 10 in the UK charts, their highest-charting album since 1991, and number 131 in the US. On 26 January 2004, the film Yesspeak premiered in a number of select theatres, followed by a closed-circuit live acoustic performance of the group that was released as Yes Acoustic: Guaranteed No Hiss later on. A 35th anniversary tour followed in 2004 which was documented on the live DVD Songs from Tsongas.  In 2004, Squire, Howe, and White reunited for one night only with former members Trevor Horn, Trevor Rabin and Geoff Downes during a show celebrating Horn's career, performing three Yes songs. The show video was released in DVD in 2008 under the name Trevor Horn and Friends: Slaves to the Rhythm.  On 18 March 2003 minor planet (7707) Yes was named in honour of the band.

Did they tour with the Magnification album?

Answer with quotes: The Yes Symphonic Tour ran from July to December 2001

Question:
Jan Zizka z Trocnova a Kalicha (Czech pronunciation: ['jan 'ZISka] ( listen); German: Johann Ziska; English: John Zizka of Trocnov and the Chalice) was a Czech general, a contemporary and follower of Jan Hus, Hussite military leader, and later also a Radical Hussite who led the Taborites. Zizka is held to be one of the most renowned military leaders by many historians and today he is widely considered a Czech national hero. He was born in the small village of Trocnov (now part of Borovany) in the Kingdom of Bohemia into an aristocratic family.
Early in 1423, internal dissent among the Hussites led to civil war. Zizka, as leader of the Taborites, defeated the men of Prague and the Utraquist nobles at Horice on April 20. Shortly afterwards came news that a new crusade against Bohemia was being prepared. This induced the Hussites to conclude an armistice at Konopiste on June 24. As soon as the crusaders had dispersed, internal dissent broke out anew. During his temporary rule over Bohemia, Prince Sigismund Korybut of Lithuania had appointed Borek, the lord of Miletinek, governor of the city of Hradec Kralove. Borek belonged to a moderate Hussite faction, the Utraquist party. After the departure of Sigismund Korybut, the city of Hradec Kralove refused to recognize Borek as its ruler, due to the democratic party gaining the upper hand. They called Zizka to its aid. He acceded to the demand and defeated the Utraquists under Borek at the farm of Strachov, near the city of Hradec Kralove on August 4, 1423.  Zizka now attempted to invade Hungary, which was under the rule of his old enemy King Sigismund. Though this Hungarian campaign was unsuccessful owing to the great superiority of the Hungarians, it ranks among the greatest military exploits of Zizka, on account of the skill he displayed in retreat. In 1424, civil war having again broken out in Bohemia, Zizka decisively defeated the "Praguers" and Utraquist nobles at Skalice on January 6, and at Malesov on June 7. In September, he marched on Prague. On the 14th of that month, peace was concluded between the Hussite parties through the influence of John of Rokycany, afterwards Utraquist archbishop of Prague. It was agreed that the now reunited Hussites should attack Moravia, part of which was still held by Sigismund's partisans, and that Zizka should be the leader in this campaign. However, he died of the plague at Pribyslav on October 11, 1424 on the Moravian frontier. According to chronicler Piccolomini, Zizka's dying wish was to have his skin used to make drums so that he might continue to lead his troops even after death. Zizka was so well regarded that when he died, his soldiers called themselves the Orphans (sirotci) because they felt like they had lost their father. His enemies said that "The one whom no mortal hand could destroy was extinguished by the finger of God."  He was succeeded by Prokop the Great.
Answer this question using a quote from the text above:

What did he do while retreating?

Answer: