The Treaty of Versailles (1919) was a document signed between Germany and the Allied Powers following World War I that officially ended that war.he terms of the treaty are often blamed for helping create the conditions that led to World War II, a major reason that European integration, not retaliation, was the leading priority in 1940s post-war Europe.
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After several more years of refinement and field testing, on January 2, 1906, Carrier was granted U.S. patent No. 808897 on his invention, which he called an Apparatus for Treating Air, the world's first spray-type air conditioning equipment.