Some context: The Wildhearts are an English rock group, formed in 1989 in Newcastle upon Tyne. The band's sound is a mixture of hard rock and melodic pop music, often described in the music press as combining influences as diverse as The Beatles and 1980s-era Metallica. However, this characterization is denied by the band, who see their influences as being far broader, as shown in the song "29 X The Pain", which lists many of group leader Ginger's influences. Despite several top 20 singles and one top 10 album in Britain, the Wildhearts have not achieved major commercial success, owing in part to difficulties with record companies and many internal problems often relating to recreational drugs and depression.
In January 2007, the band spent a week in Tutbury Castle recording vocals and finishing their new self-titled album The Wildhearts. The album was released on 23 April, preceded two weeks earlier by the download-only single "The Sweetest Song". The album received favorable reviews in the British rock press, with the Sun newspaper giving it 5 out of 5 ("probably the rock album of the year") and Rocksound magazine also giving it full marks (10 out of 10).  The band were to play a handful of shows across America, but due to delays in their Visa application they were forced to cancel the US tour. The band ended up playing multiple sold-out dates in New York, one of which was aboard a ferry. The band made up to their American fans for postponed gigs by playing very long sets of approximately two hours each night. An extensive UK tour followed in April and May. "The New Flesh" was released as a single on 1 October 2007 and became the first proper release from the self-titled album. The video for the song was shot in black and white and featured a number of children, including Ginger's own son Jake. The band released "Destroy All Monsters" as their next single. The video had a heavy theme of violence and horror.  On 19 May 2008 the Wildhearts released the all-covers album Stop Us If You've Heard This One Before, Vol 1.. Artists covered include Icicle Works, Fugazi, Helmet, Lee Harvey Oswald Band, The Distillers, The Descendents, and The Georgia Satellites. The first version of the album was a download-only collection of 12 tracks, followed by a full release with 15 tracks. In mid-2008, Rhino Records also released the three-CD compilation The Works. Described by the band as "licensed but unofficial," the compilation consists of album tracks and B-sides from the 1992-1996 era at East West Records.  The band traveled to Denmark to record their ninth studio album, !Chutzpah!, which was released on 31 August 2009, followed by a tour of the United Kingdom in September and October. At these shows, the band played the new record in its entirety, followed by an encore of older songs. Around the same time as the release of Chutzpah!, they won the award for Spirit of Independence at the 2009 Kerrang! Awards, as well as playing on the Bohemia stage during the very first UK Sonisphere Festival; a four-day music festival designed by those formerly behind Download Festival.  On 25 November 2009 The Wildhearts announced the release of !Chutzpah! Jnr., a mini-album composed of tracks recorded during the Chutzpah sessions that were either unreleased or only appeared as bonus tracks on the Japanese version of !Chutzpah!. The eight-track CD was publicized as only being available at concerts during the coming "Merry Xmess 2009" tour. However, this news caused something of a backlash from some fans, and resulted in band leader Ginger advocating the distribution of tracks via file sharing technology, as well as vowing that the album would be made available at future shows beyond the Xmess tour. The mini-album is now also available via the Wildhearts online store.
Are there any other interesting aspects about this article?
A: The band were to play a handful of shows across America, but due to delays in their Visa application they were forced to cancel the US tour.

Some context: Cu Roi (Cu Rui, Cu Raoi) mac Daire is a king of Munster in the Ulster Cycle of Irish mythology. He is usually portrayed as a warrior with superhuman abilities and a master of disguise possessed of magical powers.
Cu Roi further appears in the episode known as "The Trance of Amairgin", variants of which appear in Recension I and II of the Tain bo Cuailnge.  The episode appears as Aislinge n-Aimirgin ("The trance of Amairgin") in Recension I of the Tain. Having followed news of Cu Chulainn's sustained success in single-handedly opposing the Connacht army, Cu Roi once again appears on the scene, this time to fight Cu Chulainn directly. However, on finding Cu Chulainn weak from the injuries which Ferdiad had recently inflicted on him, he refused to carry out his original plan. Instead he faces the giant warrior poet Amairgin, who in a trance is hurling stones at the Connacht army in Tailtiu, with devastating effects. Cu Roi attacks him in kind and their stones meet in the air. They pause when on Cu Roi's request, Amairgen allows the cattle to go past Tailtiu, but seeing as the passage had become difficult, Cu Roi agrees to withdraw from the contest altogether.  The episode in the Book of Leinster (Recension II), called Imthusa Chon Rui meic Daire (header) or Oislige Amargin (text), offers by and large the same story, but adds more explicit detail, notably on the point of Cu Roi's sense of honour in his encounters with Cu Chulainn and Amairgin. First, Cu Roi explains his refusal to fight Cu Chulainn not only by pointing out the inequality between a physically healthy and an injured warrior, but also by saying that a victory would not be his, seeing as it was Fer Diad who had laid low his opponent. Second, the conclusion of Cu Roi's fight with Amairgin is told from a perspective which highlights the role of honour in his motives. Medb insisted "[b]y the truth of your [Cu Roi's] valour" ([a]r fir do gascid fritt) that he should abandon the competition, obstructive as it proved to be to the progress of the expedition. Cu Roi, however, was determined to persist "till the day of doom" (co brunni bratha) unless Amairgin agreed to stop. (When the matter was settled and Cu Roi returned to his country, Amairgin resumed his attacks on the invading army, explaining that his agreement was with Cu Roi only.)
why was cu chulainn fighting ferdiad
A: