what was the reason for his death?
Circulatory collapse caused by the cancer.
Walt Disney
 On November 30 he felt unwell and was taken to St. Joseph Hospital where, on December 15, ten days after his 65th birthday, he died of circulatory collapse caused by the cancer. 
disney animation from 1940 with a classical music sound track Fantasia who produced the film? Walt Disney what is the film about? UNANSWERABLE where is the producer mentioned above from? Hermosa, Chicago when did he start his career? 1920 what are some of the awards conferred to him? Thailand's Order of the Crown, Germany's Order of Merit, Brazil's Order of the Southern Cross and Mexico's Order of the Aztec Eagle. when did he die? December 15, 1966
wiki:19635723
Walt Disney [SEP] Illness, death and aftermath
Disney had been a heavy smoker since World War I. He did not use cigarettes with filters and had smoked a pipe as a young man. In November 1966, he was diagnosed with lung cancer and was treated with cobalt therapy. On November 30 he felt unwell and was taken to St. Joseph Hospital where, on December 15, ten days after his 65th birthday, he died of circulatory collapse caused by the cancer. His remains were cremated two days later and his ashes interred at the Forest Lawn Memorial Park in Glendale, California. The release of "The Jungle Book" and "The Happiest Millionaire" in 1967 raised the total number of feature films that Disney had been involved in to 81.