'Yes Sir, I Will' was the fifth and penultimate album released in March 1983 by the anarcho-punk band Crass. The album was essentially a bitter and virulent attack on then prime minister Margaret Thatcher and her government in the aftermath of the Falklands War and was set nearly wholly over a raging and an almost free-form improvised backing provided by the group's musicians. Many of the lyrics from this album are extracted from Penny Rimbaud's extended poem 'Rocky Eyed'. The original vinyl release contained no banding between songs, thus presenting the contents as one long piece split over both sides, making it the longest punk song ever recorded.