That year includes, among others:

The Monterey pop festival.
The formation of groups such as the Stooges, Fleetwood Mac, Procol Harum, Genesis, & Steppenwolf..
The release of several albums which are now considered as classic.
Good to know, Pink Floyd, The Jimi Hendrix Experience, David Bowie, The Velvet Underground, & The Doors made their debut album. (I must have forgotten others bands.)

• The Beatles - Sgt. Pepper’s Lonely Hearts Club Band
• The Jimi Hendrix Experience - Are you experienced?
• The Velvet Underground - The Velvet Underground & Nico
• Pink Floyd - The Piper at the Gates of Dawn
• The Who - The Who sell out
  
• The Doors - The Doors
• The Rolling Stones - Between the buttons
• Cream - Disraeli Gears
• The Kinks - Something Else by The Kinks

Many great albums are missing, but I hope I have inflamed your curiosity..

FYI, I am going to put some facts about this year on my tumblr during the summer, if you are interested in, come take a look once in a while ;)