Task: Question Generation
Input (English): Passage: After recording was completed, Music for Nations founder Martin Hooker wanted to arrange a triple bill UK tour in March / April 1984 with Exciter, Metallica, and The Rods. The Hell on Earth Tour never materialized because of poor ticket sales. To promote Ride the Lightning, Metallica commenced the Bang That Head That Doesn't Bang European tour on November 16, in Rouen, France, with British NWOBHM band Tank as support. The tour continued with dates in Belgium, Italy, Germany, and the Nordic countries to an average crowd of 1,300. After a Christmas break, the group embarked on a 50-date North American tour, firstly as a co-headlining act with W.A.S.P. and then as headliners with Armored Saint supporting. At a gig in Portland, Oregon, Metallica covered "The Money Will Roll Right In" by Fang, with Armored Saint onstage. The American leg ended in May 1985, and the band spent the following two months working on the next studio album, Master of Puppets, whose recording sessions were scheduled to begin in September. Metallica performed at the Monsters of Rock festival held at Castle Donington in England on August 17 in front of 70,000 fans. The band was placed between Ratt and Bon Jovi, two glam metal groups whose sound and appearance were much unlike Metallica's. At the start of the set, Hetfield pronounced to the audience: "If you came here to see spandex, eye make-up, and the words 'oh baby' in every fuckin' song, this ain't the fuckin' band!" Two weeks later, Metallica appeared on the Day on the Green festival in Oakland, California, before 90,000 people. The last show Metallica played before recording began was the Loreley Metal Hammer festival in Germany, headlined by Venom. Metallica finished 1985 with a show at the Sacramento Memorial Auditorium on December 29 opening for Y&T, and a New Year's Eve concert at the Civic Auditorium in San Francisco on a bill with Metal Church, Exodus, and Megadeth, the first time Metallica and Megadeth shared a stage. At this gig, Metallica premiered "Master of Puppets" and "Disposable Heroes", songs from the then-upcoming third studio album.
Output (English): What is the name of the tour for which the American leg ended in May 1985?