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In May 1940, Germany attacked France.
and conquered Luxembourg, the Netherlands, and Belgium.
On 10 May, Neville Chamberlain resigned as prime minister.
Winston Churchill appointed the prime minster of the United Kingdom.
Germany launched an offensive against France.
To circumvent the strong Maginot Line fortifications on the Franco-German border, Germany directed its attack at the neutral nations of Belgium, the Netherlands, and Luxembourg.