
1968 can legitimately lay claim to being the year hard rock was born. Led Zeppelin and Black Sabbath were both formed, the former coming together from the ashes of The Yardbirds, the latter initially under the name Earth.
In the US, Iron Butterfly scored a hit with their single In-A-Gadda-Da-Vida and fellow proto-heavy rockers Blue Cheer and Vanilla Fudge released landmark records.