Band's you have seen on their first U.S. tour


The following band's I have seen on their first U.S. tour's were Peter Green with Fleetwood Mac, Jethro Tull, Joe Cocker and his Grease Band, Led Zeppelin which still shakes me up today, Yes, and the Soft Machine. Which first tour Band's do you remember?
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Great: George Thorogood and the Delaware Destroyers
So-So: Styx

Both were opening acts on their first US tours. GT and DD opened for The Rolling Stones in 1981 and Styx opened for Aerosmith in 1977. Thorogood was awesome!! They embarrassed the Stones!
My wife saw The Eagles as an opening act on their first US tour.
Genesis in November, 1971, Mountain in 1969, and Cheryl Crow opening for John Hiatt ca 1992 are three that come quickly to mind. I believe that these were first US tours in all cases, but I'm not 100% certain.