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,
What Is Art? to justify their own tastes. Jahn notes the "often confusing use of categorisation" and the lack of definition of the key concept of emotion. Bayley writes that "the effectiveness of "What is Art?" lies not so much in its positive assertions as in its rejection of much that was taken for granted in the aesthetic theories of the time". Noyes criticises Tolstoy's dismissal of beauty, but states that, "despite its shortcomings", "What is Art?" "may be pronounced the most stimulating critical work of our time". Simmons mentions the "occasional brilliant passages" along with the "repetition, awkward language, and loose terminology".