what was the cause of war?
The cause was invasion of Poland by Germany.
World War II
World War II is generally considered to have begun on 1 September 1939, with the invasion of Poland by Germany and subsequent declarations of war on Germany by France and the United Kingdom. 
who is reba mcentire? An American country singer, songwriter, actress, and record producer. when did he begin his career? She began her career by recording for Mercury on January 22, 1976 which is her debut album? "Reba McEnitre" did she encounter with any accident? Yes, while on tour for her 1990 album. what was the accident? It was a charter jet plane crash. can you name any works by her? "It's Your Call", "Behind the Scene",  "Unlimited", etc when was the second work released? 1984 who were its distributors? UNANSWERABLE can you tell me more about her recording company mentioned above? It is an American record label that later became owned by Philips, PolyGram, and Universal Music Group. when was it formed? 1945 who founded it? Irving Green, Berle Adams, Ray Greenberg and Arthur Talmadge. can you tell me about the fourth founder? He served in the US Army during World War II. when did the aforesaid war begin? 1939
wiki:19635816
World War II [SEP] Introduction
Key setbacks in 1943—including a series of German defeats on the Eastern Front, the Allied invasions of Sicily and Italy, and Allied offensives in the Pacific—cost the Axis its initiative and forced it into strategic retreat on all fronts. In 1944, the Western Allies invaded German-occupied France, while the Soviet Union regained its territorial losses and turned towards Germany and its allies. During 1944 and 1945, Japan suffered reversals in mainland Asia, while the Allies crippled the Japanese Navy and captured key Western Pacific islands.