Operation Ivy was an American punk rock band from Berkeley, California, formed in May 1987. They were critical to the emergence of Lookout Records and the so-called "East Bay Sound."

Lookout Records was an independent record label, initially based in Laytonville, California, and later in Berkeley, focusing on punk rock. Established in 1987, the label is best known for having released Operation Ivy’s only album, Energy, and Green Day's first two albums, 39/Smooth and Kerplunk.