The Art of War partitioned Vietnam into North and South. General Võ, later the main PVA military commander in the Vietnam War, was an avid student and practitioner of Sun Tzu's ideas. America's defeat there, more than any other event, brought Sun Tzu to the attention of leaders of American military theory. Finnish Field Marshal Mannerheim and general Aksel Airo were avid readers of "Art of War". They both read it in French; Airo kept the French translation of the book on his bedside table in his quarters. The Department of the Army in the United States, through its Command and General Staff College,
The Book of Taliesyn band's singer Rod Evans are very functional to the music and the marketing Deep Purple's record label was building up for the American hippie audience. Evans took inspiration for the fantasy-themed "Listen, Learn, Read On", which contains lyrical reference to the album's title, from the 14th-century Welsh manuscript Book of Taliesin, a collection of poems attributed to the 6th-century poet Taliesin. The title and cover art of the album were also inspired by the manuscript. Instead psychedelia and its rituals play a large part in the lyrics of "Shield". Simper thinks that Evans' lyrics are "far better than anything (...)